diff --git a/chat/conversations.ts b/chat/conversations.ts
index d6a192c..ee7f83a 100644
--- a/chat/conversations.ts
+++ b/chat/conversations.ts
@@ -641,6 +641,14 @@ export default function(this: any): Interfaces.State {
         queuedJoin(state.pinned.channels.slice());
     });
     core.channels.onEvent(async(type, channel, member) => {
+        if (type === 'leave') {
+            const conv = state.channelMap[channel.id];
+
+            if (conv) {
+                conv.adManager.stop();
+            }
+        }
+
         if(type === 'join')
             if(member === undefined) {
                 const conv = new ChannelConversation(channel);