always include mls if it is already in supported list

src/script/self/SelfRepository.ts

@@ -185,9 +185,15 @@ export class SelfRepository extends TypedEventEmitter<Events> {
     const localSupportedProtocols = this.selfUser.supportedProtocols();
 
     this.logger.info('Evaluating self supported protocols, currently supported protocols:', localSupportedProtocols);
+
+    const currentSelf = await this.selfService.getSelf([]);
+
+    const previousSupportedProtocols = currentSelf.supported_protocols;
+
     const refreshedSupportedProtocols = await evaluateSelfSupportedProtocols(
       this.teamRepository,
       this.clientRepository,
+      previousSupportedProtocols,
     );
 
     if (!localSupportedProtocols) {

src/script/self/SelfSupportedProtocols/SelfSupportedProtocols.ts

@@ -104,6 +104,7 @@ const isMLSSupported = async (
 export const evaluateSelfSupportedProtocols = async (
   teamHandler: SelfSupportedProtocolsTeamHandler,
   selfClientsHandler: SelfSupportedProtocolsSelfClientsHandler,
+  previousSupportedProtocols: ConversationProtocol[] = [],
 ): Promise<ConversationProtocol[]> => {
   const supportedProtocols: ConversationProtocol[] = [];
 
@@ -116,7 +117,7 @@ export const evaluateSelfSupportedProtocols = async (
 
   const isMLSForced = await isMLSForcedWithoutMigration(teamHandler, selfClientsHandler);
 
-  if (isMLSProtocolSupported || isMLSForced) {
+  if (isMLSProtocolSupported || isMLSForced || previousSupportedProtocols.includes(ConversationProtocol.MLS)) {
     supportedProtocols.push(ConversationProtocol.MLS);
   }