It’s a docx that was fully edited on the same device and hasn’t been converted as far as I’m aware of. It’s saved on OneDrive though, so maybe there’s something going on there.
Eitherway, pasting in a single word works
Removing the space works
Removing and adding a space also works
I messed around a bit more and it’s definitely Word being weird about its spaces. If I type in two words with a whitespace and copy-paste it works fine
However if I save the docx locally, close it, and reopen it, the error occurs