diff --git a/src/slack/monitor/events/messages.ts b/src/slack/monitor/events/messages.ts
index 514f0e0d2..9003fcba5 100644
--- a/src/slack/monitor/events/messages.ts
+++ b/src/slack/monitor/events/messages.ts
@@ -108,6 +108,7 @@ export function registerSlackMessageEvents(params: {
           sessionKey,
           contextKey: `slack:thread:broadcast:${channelId ?? "unknown"}:${messageId ?? "unknown"}`,
         });
+        await handleSlackMessage(message, { source: "message" });
         return;
       }