Lowercase room alias before joining

src/matrix-utils.ts

@@ -211,6 +211,12 @@ export function fullAliasFromRoomName(
   return `#${roomAliasLocalpartFromRoomName(roomName)}:${client.getDomain()}`;
 }
 
+/**
+ * XXX What is this trying to do? It looks like it's getting the localpart from
+ * a room alias, but why is it splitting on hyphens and then putting spaces in??
+ * @param roomId
+ * @returns
+ */
 export function roomNameFromRoomId(roomId: string): string {
   return roomId
     .match(/([^:]+):.*$/)[1]

src/room/useLoadGroupCall.ts

@@ -52,7 +52,11 @@ export const useLoadGroupCall = (
 
     const fetchOrCreateRoom = async (): Promise<Room> => {
       try {
-        const room = await client.joinRoom(roomIdOrAlias, { viaServers });
+        // We lowercase the localpart when we create the room, so we must lowercase
+        // it here too (we just do the whole alias).
+        const room = await client.joinRoom(roomIdOrAlias.toLowerCase(), {
+          viaServers,
+        });
         logger.info(
           `Joined ${roomIdOrAlias}, waiting room to be ready for group calls`
         );