Reported to upstream. https://gitlab.xfce.org/apps/xfce4-terminal/-/issues/70
Added patch to xfce4-terminal-0.8.9.2-2.mga8 based on upstream commit to Xfwm4: https://gitlab.xfce.org/xfce/xfwm4/-/commit/056ba6adbf44ded5b4f51338ef3a14cecdbde213
Fixed.
Resolution: (none) => FIXEDStatus: NEW => RESOLVED