Input subsystem: user-defined Compose sequences are ignored

[smartptr]

Hello,

I've got a few custom compose sequences defined in ~/.XCompose, and they seem to be ignored by Vivaldi snapshot, e.g.:

<Multi_key> <minus> <period> : "−" # MINUS SIGN (U+2212)

They work though in Chrome Beta and other applications.

Some other sequences like ®©™ still work. The standard ibus “preentry” indicator doesn't appear, which also differs Vivaldi from other applications. “Use native window” setting didn't make any difference.

System details: default GNOME on Fedora 37 Workstation, Wayland, default ibus input method.

Thanks.