hanja selection window disappears right after showing up

[OctopusET]

When I press "hanja" key, hanja selection window does show up, but it disappears after a second. Tested on firefox, and chromium (xwayland).

System Info: Archlinux wayland 1.19.0-2 kime-git (2.5.6.r18.c242569-1) sway-git (r6816.fc25e494-1) firefox (94.0.1-1) chromium-snapshot-bin (98.0.4695.0.r939184-1)