diff --git a/_locales/de/messages.json b/_locales/de/messages.json
index dc28e1e26..cc088f205 100644
--- a/_locales/de/messages.json
+++ b/_locales/de/messages.json
@@ -1457,6 +1457,6 @@
         "message": "Bitte wählen Sie mindestens zwei Gruppenmitglieder aus."
     },
     "closedGroupMaxSize": {
-        "message": "Eine geschlossene Gruppe kann maximal zwanzig Mitglieder haben."
+        "message": "Eine geschlossene Gruppe kann maximal einhundert Mitglieder haben."
     }
 }
\ No newline at end of file
diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 110748d36..f82c6c8eb 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -2209,7 +2209,7 @@
     "androidKey": "activity_create_closed_group_not_enough_group_members_error"
   },
   "closedGroupMaxSize": {
-    "message": "A closed group cannot have more than 20 members",
+    "message": "A closed group cannot have more than 100 members",
     "androidKey": "activity_create_closed_group_too_many_group_members_error"
   },
   "noBlockedContacts": {
diff --git a/_locales/es/messages.json b/_locales/es/messages.json
index 342dbd904..ed3dcafd8 100644
--- a/_locales/es/messages.json
+++ b/_locales/es/messages.json
@@ -1403,6 +1403,6 @@
         "message": "Por favor, elige al menos 2 miembros del grupo"
     },
     "closedGroupMaxSize": {
-        "message": "Un grupo cerrado no puede tener más de 20 miembros"
+        "message": "Un grupo cerrado no puede tener más de 100 miembros"
     }
 }
\ No newline at end of file
diff --git a/_locales/fr/messages.json b/_locales/fr/messages.json
index 88a5f74d6..e507f7352 100644
--- a/_locales/fr/messages.json
+++ b/_locales/fr/messages.json
@@ -1403,7 +1403,7 @@
         "message": "Veuillez sélectionner au moins 2 membres"
     },
     "closedGroupMaxSize": {
-        "message": "Un groupe privé ne peut pas avoir plus de 20 membres"
+        "message": "Un groupe privé ne peut pas avoir plus de 100 membres"
     },
     "contextMenuNoSuggestions": {
         "message": "Pas de suggestions",
diff --git a/_locales/id/messages.json b/_locales/id/messages.json
index e51394097..25c533fad 100644
--- a/_locales/id/messages.json
+++ b/_locales/id/messages.json
@@ -1397,7 +1397,7 @@
         "message": "Pilih setidaknya 2 anggota grup"
     },
     "closedGroupMaxSize": {
-        "message": "Grup tertutup maksimal berisi 20 anggota"
+        "message": "Grup tertutup maksimal berisi 100 anggota"
     },
     "noBlockedContacts": {
         "message": "Tidak ada kontak yang diblokir"
diff --git a/_locales/it/messages.json b/_locales/it/messages.json
index 38ee2b883..72b14f3cb 100644
--- a/_locales/it/messages.json
+++ b/_locales/it/messages.json
@@ -1403,6 +1403,6 @@
         "message": "Scegli almeno 2 membri del gruppo"
     },
     "closedGroupMaxSize": {
-        "message": "Un gruppo chiuso non può avere più di 20 membri"
+        "message": "Un gruppo chiuso non può avere più di 100 membri"
     }
 }
\ No newline at end of file
diff --git a/_locales/ja/messages.json b/_locales/ja/messages.json
index 74c19d1e5..34005adbf 100644
--- a/_locales/ja/messages.json
+++ b/_locales/ja/messages.json
@@ -1403,7 +1403,7 @@
         "message": "グループメンバーを少なくとも 2 人選択してください"
     },
     "closedGroupMaxSize": {
-        "message": "閉じたグループは 20 人を超えるメンバーを抱えることはできません"
+        "message": "閉じたグループは 100 人を超えるメンバーを抱えることはできません"
     },
     "noBlockedContacts": {
         "message": "ブロックしている連絡先はありません"
diff --git a/_locales/pl/messages.json b/_locales/pl/messages.json
index e2ca51fa5..77d2dcc51 100644
--- a/_locales/pl/messages.json
+++ b/_locales/pl/messages.json
@@ -1400,7 +1400,7 @@
         "message": "Wprowadź krótszą nazwę grupy"
     },
     "closedGroupMaxSize": {
-        "message": "Grupa zamknięta nie może mieć więcej niż 20 członków"
+        "message": "Grupa zamknięta nie może mieć więcej niż 100 członków"
     },
     "noBlockedContacts": {
         "message": "Brak zablokowanych kontaktów"
diff --git a/_locales/pt_BR/messages.json b/_locales/pt_BR/messages.json
index e00f0e6fb..a95e0db4a 100644
--- a/_locales/pt_BR/messages.json
+++ b/_locales/pt_BR/messages.json
@@ -1403,6 +1403,6 @@
         "message": "Escolha pelo menos 2 membros do grupo"
     },
     "closedGroupMaxSize": {
-        "message": "Um grupo fechado não pode ter mais de 20 membros"
+        "message": "Um grupo fechado não pode ter mais de 100 membros"
     }
 }
\ No newline at end of file
diff --git a/_locales/ru/messages.json b/_locales/ru/messages.json
index e22014637..9870f1a0d 100644
--- a/_locales/ru/messages.json
+++ b/_locales/ru/messages.json
@@ -1403,7 +1403,7 @@
         "message": "Пожалуйста, выберите как минимум 1 участников группы"
     },
     "closedGroupMaxSize": {
-        "message": "В закрытой группе не может быть больше 20 участников"
+        "message": "В закрытой группе не может быть больше 100 участников"
     },
     "contextMenuNoSuggestions": {
         "message": "No Suggestions",
diff --git a/_locales/vi/messages.json b/_locales/vi/messages.json
index ed5f078e7..d5d754c5c 100644
--- a/_locales/vi/messages.json
+++ b/_locales/vi/messages.json
@@ -1361,6 +1361,6 @@
         "message": "Vui lòng chọn ít nhất 2 thành viên trong nhóm"
     },
     "closedGroupMaxSize": {
-        "message": "Một nhóm kín không thể có nhiều hơn 20 thành viên"
+        "message": "Một nhóm kín không thể có nhiều hơn 100 thành viên"
     }
 }
\ No newline at end of file
diff --git a/js/util_worker_tasks.js b/js/util_worker_tasks.js
index 90fa017cd..10c50721c 100644
--- a/js/util_worker_tasks.js
+++ b/js/util_worker_tasks.js
@@ -2,7 +2,6 @@
 /* eslint-disable strict */
 
 const functions = {
-  stringToArrayBufferBase64,
   arrayBufferToStringBase64,
   calcPoW,
 };
@@ -35,9 +34,6 @@ function prepareErrorForPostMessage(error) {
   return error.message;
 }
 
-function stringToArrayBufferBase64(string) {
-  return dcodeIO.ByteBuffer.wrap(string, 'base64').toArrayBuffer();
-}
 function arrayBufferToStringBase64(arrayBuffer) {
   return dcodeIO.ByteBuffer.wrap(arrayBuffer).toString('base64');
 }
diff --git a/libtextsecure/message_receiver.js b/libtextsecure/message_receiver.js
index f52030485..4721cecc8 100644
--- a/libtextsecure/message_receiver.js
+++ b/libtextsecure/message_receiver.js
@@ -23,7 +23,7 @@ function MessageReceiver() {
       // bind events
       lokiPublicChatAPI.on(
         'publicMessage',
-        window.NewReceiver.handleUnencryptedMessage
+        window.NewReceiver.handlePublicMessage
       );
       openGroupBound = true;
     }
@@ -36,9 +36,6 @@ MessageReceiver.stringToArrayBuffer = string =>
   Promise.resolve(dcodeIO.ByteBuffer.wrap(string, 'binary').toArrayBuffer());
 MessageReceiver.arrayBufferToString = arrayBuffer =>
   Promise.resolve(dcodeIO.ByteBuffer.wrap(arrayBuffer).toString('binary'));
-
-MessageReceiver.stringToArrayBufferBase64 = string =>
-  callWorker('stringToArrayBufferBase64', string);
 MessageReceiver.arrayBufferToStringBase64 = arrayBuffer =>
   callWorker('arrayBufferToStringBase64', arrayBuffer);
 
@@ -112,7 +109,5 @@ textsecure.MessageReceiver.stringToArrayBuffer =
   MessageReceiver.stringToArrayBuffer;
 textsecure.MessageReceiver.arrayBufferToString =
   MessageReceiver.arrayBufferToString;
-textsecure.MessageReceiver.stringToArrayBufferBase64 =
-  MessageReceiver.stringToArrayBufferBase64;
 textsecure.MessageReceiver.arrayBufferToStringBase64 =
   MessageReceiver.arrayBufferToStringBase64;
diff --git a/package.json b/package.json
index e672f2387..ed3e34150 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "session-desktop",
   "productName": "Session",
   "description": "Private messaging from your desktop",
-  "version": "1.4.5",
+  "version": "1.4.7",
   "license": "GPL-3.0",
   "author": {
     "name": "Loki Project",
diff --git a/ts/receiver/dataMessage.ts b/ts/receiver/dataMessage.ts
index 33f408e76..68485227e 100644
--- a/ts/receiver/dataMessage.ts
+++ b/ts/receiver/dataMessage.ts
@@ -263,23 +263,31 @@ export async function handleDataMessage(
 
   const message = await processDecrypted(envelope, dataMessage);
   const ourPubKey = window.textsecure.storage.user.getNumber();
+  const source = envelope.source;
   const senderPubKey = envelope.senderIdentity || envelope.source;
   const isMe = senderPubKey === ourPubKey;
-  const conversation = ConversationController.getInstance().get(senderPubKey);
+  const senderConversation = await ConversationController.getInstance().getOrCreateAndWait(
+    senderPubKey,
+    'private'
+  );
 
   // Check if we need to update any profile names
-  if (!isMe && conversation && message.profile) {
-    await updateProfile(conversation, message.profile, message.profileKey);
+  if (!isMe && senderConversation && message.profile) {
+    await updateProfile(
+      senderConversation,
+      message.profile,
+      message.profileKey
+    );
   }
   if (isMessageEmpty(message)) {
     window.log.warn(`Message ${getEnvelopeId(envelope)} ignored; it was empty`);
     return removeFromCache(envelope);
   }
 
-  const source = envelope.senderIdentity || senderPubKey;
-  const ownDevice = await isUs(source);
+  const ownDevice = await isUs(senderPubKey);
 
-  const ownMessage = conversation?.isMediumGroup() && ownDevice;
+  const sourceConversation = ConversationController.getInstance().get(source);
+  const ownMessage = sourceConversation?.isMediumGroup() && ownDevice;
 
   const ev: any = {};
   if (ownMessage) {
@@ -299,7 +307,7 @@ export async function handleDataMessage(
 
   ev.confirm = () => removeFromCache(envelope);
   ev.data = {
-    source,
+    source: senderPubKey,
     sourceDevice: 1,
     timestamp: _.toNumber(envelope.timestamp),
     receivedAt: envelope.receivedAt,
diff --git a/ts/receiver/receiver.ts b/ts/receiver/receiver.ts
index 22bd112be..5eff029cb 100644
--- a/ts/receiver/receiver.ts
+++ b/ts/receiver/receiver.ts
@@ -270,7 +270,7 @@ async function handleDecryptedEnvelope(
   }
 }
 
-export async function handleUnencryptedMessage({ message: outerMessage }: any) {
+export async function handlePublicMessage({ message: outerMessage }: any) {
   const { source } = outerMessage;
   const { group, profile, profileKey } = outerMessage.message;
 
@@ -289,9 +289,15 @@ export async function handleUnencryptedMessage({ message: outerMessage }: any) {
   const isPublicChatMessage =
     group && group.id && !!group.id.match(/^publicChat:/);
 
+  if (!isPublicChatMessage) {
+    throw new Error(
+      'handlePublicMessage Should only be called with public message groups'
+    );
+  }
+
   const ev = {
     // Public chat messages from ourselves should be outgoing
-    type: isPublicChatMessage && isOurDevice ? 'sent' : 'message',
+    type: isOurDevice ? 'sent' : 'message',
     data: outerMessage,
     confirm: () => {
       /* do nothing */