Your bug report

#74134: 29.4; emacs-pgtk and emacs-gtk-x11 does not react the same way to c-s-u

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 74134@debbugs.gnu.org.

-- 
74134: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=74134
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems