I’ve never encountered this problem.
Askthepizzaguy - do you have something that causes your page to refresh, maybe?
The default hotkeys for refreshing the page in Firefox are F5 or CTRL+R. Is it possible that you might be accidentally typing CTRL+R instead of Shift+R sometimes, causing the page to refresh and your text to be lost?
Or maybe you have an extension that adds mouse gestures or tab behavior that causes refreshing when you’re not expecting it?
Just a suggestion. I have no idea really.