Your bug report

#31073: 27.0.50; query-replace undo might change the word case

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 31073@debbugs.gnu.org.

-- 
31073: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=31073
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems