Jira 8.1.0 server. Firefox OSX.
The hover list of choices always overlays the create new issue dialog. In the screenshot, the cursor is in the description field. It doesn't happen for all types of issues, so maybe something about the order of the fields in the dialog makes a difference?
Does pressing 'ESC' key hides the pop-up?
Thanks Aristedes for reporting this issue. A fix is now available in the marketplace with 1.20.1 version.