TTS doesn't stop if the page it reads from gets closed

**OS**: Microsoft Windows 11 Pro
**Browser:** Helium, Version 0.6.7.1 (Official Build, Chromium 142.0.7444.175) (64-bit)

1. Get on a page
2. Click "Read Page"
3. Close the tab of the page Supertonic is currently reading from
4. Hear that Supertonic just continues reading instead of stopping