Huh. That’s interesting.
If you don’t mind me asking, do the options show for you here on Meta?
Reason I ask is, while it’s not impossible it’s a Discourse plugin issue, if it was, I would expect it to affect everyone. Checking your preferences here on Meta would clarify whether it’s a web browser setting / extension that’s responsible. Only asking as it’s quick to check & it would be good to rule them out.