I'm blocked from reviewing for some time, but I'm not blocked from editing. I would like to edit someone's question, but there is another suggested edit review pending. I can't approve it because of the review ban, but also I can't do any other edit as when I click "edit" it redirects me to approve the edit. Is that expected or this is a bug?
If there is a pending edit suggestion then no one can submit an edit without first reviewing the suggested edit. And since you're review banned, you can't perform the necessary review to submit an edit of your own; no bug there.
The fact that it redirects you to the suggested edit could be seen as a UI oversight (as Glorfindel points out the same happens when you have reached your review limit), but you're only banned from reviewing—not from viewing suggested edits; so that's debatable.