Text to speech plays even after I close Web Preview

I’m using TTS in one of my apps, and I close the web preview. The TTS still continued playing. I could use WHEN SCREEN1 BACK BUTTON PRESSED, but I doubt that would work on the web. Any suggestions to stop the TTS when the app is closed?

Try hard reloding the page?

No, this doesn’t work.

Can you give me your thunkable link?

I’ll try to help…

This issue is not just for one project, it’s for every single TTS project I have.