Several keyboards don't work properly in gnome-terminal (Ubuntu 22.04 w/X11 and Ubuntu 23.10 w/X11)

Khmer Angkor:
xEjmr
Expected output: ខ្មែរ
Actual output: មែរ

Vedic Sanskrit Devanagari Phonetic (ITRANS):
shrI
Expected output: श्री
Actual output: री

Korean KORDA Jamo (SIL):
hanspacegeulspace
Expected output: 한글
Actual output: 한ᅳᆯ

IPA (SIL):
n>
Expected output: ŋ
Actual output sometimes: nŋ
(moved to #10536)