I am an extended confirmed user editor on Wikipedia. On Michael Rosen, which is pending changes protected, my 8 Feb edit https://en.wikipedia.org/w/index.php?title=Michael_Rosen&type=revision&diff=1005571365&oldid=1005008162 was automatically accepted, but those of 19 Feb were not e.g. (the first one) https://en.wikipedia.org/w/index.php?title=Michael_Rosen&type=revision&diff=1007735566&oldid=1007730996. The edit history shows the issue more clearly: https://en.wikipedia.org/w/index.php?title=Michael_Rosen&action=history
I have not had this problem before.
The issue is the same for all pending changes protected articles which I have subsequently edited e.g.
https://en.wikipedia.org/w/index.php?title=2008_Mumbai_attacks&action=history
I can continue to edit articles which are not pending change protected as before, included those with extended protection and extended confirmed protection.
STEPS TO REPRODUCE
Find an article with pending changes protection ([[Category:Wikipedia_pending_changes_protected_pages]])
Click on Edit
Change something
Click on Submit changes
ACTUAL RESULTS
The edit appears in the edit history as a pending edit with the notice “pending review”. The edit is not made to the article until it is accepted by a pending changes reviewer.
EXPECTED RESULTS
The edit is automatically accepted.
I use Microsoft Windows and Chrome on a desktop. The issue is the same on Firefox.