The day before yesterday I reviewed this suggested edit in the Super User Suggested Edit Review Queue (I have > 2K rep there). I clicked on “Improve Edit”, made some more changes, and saved (submitted) them. All the changes were made (both the ones “suggested” by Chema and mine), and the revision history shows two revisions — #5, by Chema, and #6, by me — made at the exact same time.
The issue is that revision #5 is shown as having been reviewed by the Community user, with no indication that I did an Improve Edit:
unlike the normal way it looks when I improve an edit:
Also, I looked at my editing stats, and they were the same before and after:
[Scott has approved 1267 edit suggestions and rejected 750 edit suggestions and improved 289 edit suggestions]
Normally the third number (improved ___ edit suggestions) would go up by one.
Also, it does not appear in my Review history (user profile → “Activity” → “all actions” → “reviews”) or the site’s Suggested Edit history.
This happens on a recurring, but occasional (irregular, irreproducible), basis. For example, see X, Y, and Z. I did “Reject and Edit” on all three, but I didn’t “get credit” for X.