Fix wrong value returned by hasObservers (#13655)

BabylonJS · Mar 22, 2023 · 689afcc · 689afcc
1 parent 2582bc1
commit 689afcc
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/packages/dev/core/src/Misc/observable.ts b/packages/dev/core/src/Misc/observable.ts
@@ -266,6 +266,9 @@ export class Observable<T> {
      * @internal
      */
     public _deferUnregister(observer: Observer<T>): void {
+        if (observer._willBeUnregistered) {
+            return;
+        }
         this._numObserversMarkedAsDeleted++;
         observer.unregisterOnNextCall = false;
         observer._willBeUnregistered = true;