1) It is expected behavior because this reloads in the background without user control.
2) It is related to the latest YouTube updates and will be fixed in the next version.

All basics are free. You can see it in the full tutorial: https://www.youtube.com/watch?v=r4iX53Qg2sE If you need more, become my supporter. It takes time to update the extension every time Youtube changes internally. A lifetime license is not an option.