diff --git a/integration-test/langfuse-openai.spec.ts b/integration-test/langfuse-openai.spec.ts
index 5ca4bac7..0207c631 100644
--- a/integration-test/langfuse-openai.spec.ts
+++ b/integration-test/langfuse-openai.spec.ts
@@ -981,7 +981,7 @@ describe("Langfuse-OpenAI-Integation", () => {
     expect(messages).toBeDefined();
 
     await client.flushAsync();
-  }, 10000);
+  }, 20_000);
 
   it("should work with structured output parsing with response_format", async () => {
     const traceId = randomUUID();
diff --git a/langfuse-core/src/index.ts b/langfuse-core/src/index.ts
index 41415227..c548833d 100644
--- a/langfuse-core/src/index.ts
+++ b/langfuse-core/src/index.ts
@@ -594,7 +594,8 @@ abstract class LangfuseCoreStateless {
     try {
       JSON.stringify(finalEventBody);
     } catch (e) {
-      throw Error(`[Langfuse SDK] Event Body for ${type} is not JSON-serializable: ${e}`);
+      this._events.emit("error", `[Langfuse SDK] Event Body for ${type} is not JSON-serializable: ${e}`);
+      return;
     }
 
     const queue = this.getPersistedProperty<LangfuseQueueItem[]>(LangfusePersistedProperty.Queue) || [];