I may have found the need for a feature request in the iOS Stack Exchange app, although I would like to have my assumption confirmed.
I have raised this feature request on Meta, iOS app does not warn that a subsequent edit has been made.
The issue is that I attempted to make an edit to the question, How to use 'either or'?. The edit was rejected - which was fair enough:
but the replacement edit was nearly identical (although my proposed ellipsis in the title was missing):
Therefore, I was rather stumped, as to why my edit had been rejected.
It took me a while to realise that my edit had tried to revert Jasper's tag changes. I had not meant to do this, but as I had opened the edit before Jasper's changes were made, and then submitted afterwards, my simple typo fixing edit also attempted to revert Jasper's tag changes. This was not my intention.
TL;DR
Long story short, was my edit rejected (as it should have been), because of the (inadvertent) tag changes, or for some other reason? I am assuming that it was due to the proposed tag changes, rather than the spelling correction and added ellipses.
If so, then I do apologise and that it was due to a deficiency in my version of the iOS app, rather than an intentional tag change. Hence, my feature request for the iOS app on SE.Meta