diff --git a/src/app/services/leave-planner-worker-lifetime.spec.ts b/src/app/services/leave-planner-worker-lifetime.spec.ts
index 3b5e1f5..db0b4da 100644
--- a/src/app/services/leave-planner-worker-lifetime.spec.ts
+++ b/src/app/services/leave-planner-worker-lifetime.spec.ts
@@ -128,7 +128,7 @@ describe('worker job lifetime', () => {
 			expect(worker.onerror).toBeNull();
 		};
 
-		it('releases the worker once on success and ignores late messages', async () => {
+		it('releases the worker once on success and leaves no handler for late messages', async () => {
 			const job = await start({});
 			job.deliver();
 			expect(await job.succeeded).toBe(true);
diff --git a/src/app/services/leave-planner.service.ts b/src/app/services/leave-planner.service.ts
index 40e06e5..e6cccc5 100644
--- a/src/app/services/leave-planner.service.ts
+++ b/src/app/services/leave-planner.service.ts
@@ -323,10 +323,10 @@ function startWorkerJob(
 	});
 	let released = false;
 	worker.onmessage = (event: MessageEvent<WorkerResponse>) => {
-		if (!released && event.data) onMessage(event.data);
+		if (event.data) onMessage(event.data);
 	};
 	worker.onerror = () => {
-		if (!released) onError();
+		onError();
 	};
 	latestWorkerCancels.add(supersede);
 	return {