Steam doesn't recognise polish letters on linux anymore.

[kubuś (made-up)]

ISSUE
Steam doesn't recognise polish letters after the new update came in.(both stable and beta)
This is what steam outputs to console when I launch steam via steam-native command in terminal ,this is what happens when I click and release the right alt key:
[0827/131751.127877:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0
[0827/131751.332961:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0
[0827/131751.904759:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0
[0827/131752.416024:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0
[0827/131752.998130:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0
[0827/131753.453420:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0
[0827/131753.884704:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0
[0827/131754.080842:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0
[0827/131754.236512:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0
[0827/131755.107700:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0
[0827/131755.944279:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0
[0827/131756.106724:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0
[0827/131756.352032:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0
[0827/131756.525586:WARNING:keyboard_code_conversion_x.cc(1357)] Unknown keycode:0


OS
Arch Linux

STEPS
Install arch linux
Install plasma-desktop sddm steam steam-native-runtime
Set in kde settings polish keyboard layout
Relogin
Launch steam-native
Go to steam chat
Try to chat with friend in Polish
Go anywhere into Steam really when it worked just fine on linux.

EXPECTED
I don't look like a 10 year old child that doesn't know polish ortography.
łóżźćęąńś shows up when I click l+right alt/alt gr o+alt z+alt x+alt c+alt e+alt a+alt n+alt s+alt

[VDavid003 | [HUN]]

Same here but with Hungarian letters (btw I use arch too)

[VDavid003 | [HUN]]

so,

locale-gen

fixed it for me

[kubuś (made-up)]

Yep I had to add english locale, thought I could get away just having pl_PL.utf-8 utf-8 locale.
I didn't forgot to do locale-gen during install btw

[kubuś (made-up)]

I think it was en_US.UTF-8 UTF-8 that needs to be added

[Enigmatic]

Odd I have issue and I have utf-8.
[0611/212752.011363:WARNING:keyboard_code_conversion_x.cc(1441)] Unknown keycode:108
[0611/212754.429428:WARNING:keyboard_code_conversion_x.cc(1441)] Unknown keycode:108
[0611/212754.824474:WARNING:keyboard_code_conversion_x.cc(1441)] Unknown keycode:108
[0611/212918.203707:WARNING:keyboard_code_conversion_x.cc(1441)] Unknown keycode:108
[0611/212923.992752:WARNING:keyboard_code_conversion_x.cc(1441)] Unknown keycode:108
[0611/212924.147694:WARNING:keyboard_code_conversion_x.cc(1441)] Unknown keycode:108
[0611/212929.266001:WARNING:keyboard_code_conversion_x.cc(1441)] Unknown keycode:108
[0611/220437.412575:WARNING:keyboard_code_conversion_x.cc(1441)] Unknown keycode:108
[0611/220450.374521:WARNING:keyboard_code_conversion_x.cc(1441)] Unknown keycode:108
[0611/220503.358554:WARNING:keyboard_code_conversion_x.cc(1441)] Unknown keycode:1
[0611/220506.729658:WARNING:keyboard_code_conversion_x.cc(1441)] Unknown keycode:108
[0611/220526.486448:WARNING:keyboard_code_conversion_x.cc(1441)] Unknown keycode:22

devuan here. ąężźłó well just regular typing l key triggers 108 not sure why.
Sounds like it is triggering a key stroke injection?