The following just happened:
- I did some cleanup on a site where I have < 2k rep. I had to do the edits in batches, as I could only do a few at a time, and wait for them to be approved.
- While waiting for one batch to be approved, I posted a question.
- I then noticed a somewhat serious error in this question of mine. I tried to correct the error, but I wasn't even able to initiate the edit. As soon as I clicked the "edit" button, there was a white screen with text telling me I had to wait until the reviews of the other edits were done. It's the same thing that would have happened had I tried to edit someone else's post at that point.
When editing my own posts, I don't think this limitation should apply. Having edits pending in the review queue shouldn't alter users' ability to edit their own posts.