Help window does not activate via cdlatex-math-symbol-prefix with pgtk enabled

[mits-haruko]

If Emacs >= 29 is built with pgtk enabled, the help window will never appear when activating cdlatex-math-symbol or cdlatex-math-modify. Invoking both explicitly via M-x works, however. Tested with pgtk disabled removes the problem.

I don't know if this is something that can be fixed, or it has to do with pgtk/wayland weird interactions. Not something that can't be lived without, but sometimes is good to have the help window to remember shortcuts.