Words disappearing when pasting into posts


Curious if anybody else has whole words disappearing when pasting into posts. So I type everything in word 1st then pasting in my posts. I do this because sometimes my post disappears before I have a chance to actually post it if I accidentally hit the enter key and Facebook is the worst.

I can understand missing a letter or 2, but not a whole complete word. For years I’ve heard about malware that captures keystrokes and worried it might be something like that although I do have Malwarebytes running. What could be causing this?