This is hard to explain or reproduce. I started to notice random end-of-line hyphenations in copy paste.
example:
I copy pasted:
Shadow's brother Beast appears with the dryad Deodara, who angrily exposes the pixie Apple Ce-darfrost's plot to kidnap her for use as a meenlock breeding seed. The Elder traps the pixie with mag-ic.
and those dash marks were NOT in the original.
some copy paste creates dash marks, not sure how to reproduce without the text i had
I think I found the problem.
I use MS Word for part of my process and I do a lot of copy/paste and it seems ctrl-x from ms word might be adding the discretionary marks being interpreted as permanent for some reason.
I found out it was happening in my gmbinder as well which led me down a rabbit hole.