I was reviewing a possible "Low Quality Post" and decided to edit it.
I completely revised title, body and tags to contain proper English, describe the post and improve the MathJax.
Then, I tried to submit. I got this:
How can I ever finish my review now? (I eventually copied title and body, cancelled the edit, voted "looks good" and manually applied the edit. But that's ridiculous.)
This type of annoyance is quite common when doing a substantial revision in the review queue. This particular instance is worse than most, because only the tags were altered.
My suggested solution (to be applied to editing in any circumstance):
Have a link/button available to load the tag edit asynchronously -- similarly for title edits.
That is, let me stay in the current window, and when I click "load edit", replace the title/tags with the edited version. Being synced with the other edit, I can now decide to alter that part of the post as well, just as if I had started editing after the concurrent edit -- but without losing my precious edit of the question body.
Please feel free to suggest other solutions in the answers.