The main issue I have is it only caches the text when you hit a key. Anytime there's a keystroke it saves instantly. The option "interval to save text" does not work. So if you accidentally highlight the whole comment and hit a key it'll delete everything and then boom your cache will be empty. This has happened to me a few times. I'd much rather it save using a time interval to prevent this.

Addon hasn't been updated in over 3 years so that's likely why it has issues. Still, it's better to have this than not have anything.