diff --git a/bot/src/stream/selfbot.ts b/bot/src/stream/selfbot.ts
index 1b53749..48b2cf2 100644
--- a/bot/src/stream/selfbot.ts
+++ b/bot/src/stream/selfbot.ts
@@ -197,10 +197,16 @@ export class SelfbotStreamer implements ScreenStreamer {
       } catch {
         /* ignore */
       }
-      if (this.capture === capture) this.capture = null;
-      if (this.streamer === streamer) this.streamer = null;
-      if (this.controller === controller) this.controller = null;
-      this.active = false;
+      // Only release the lock / clear instance state if WE are still the
+      // current attempt. If a concurrent stop()+start() already replaced the
+      // controller, a newer start() owns `active` — clearing it here would
+      // unlock it mid-startup and let a third start() race in.
+      if (this.controller === controller) {
+        if (this.capture === capture) this.capture = null;
+        if (this.streamer === streamer) this.streamer = null;
+        this.controller = null;
+        this.active = false;
+      }
       if (signal.aborted) return "송출을 시작하는 중에 중지했습니다.";
       throw e;
     }