I am having an issue with RaspberryPi Steamlink where my keyboard inputs all non-standard characters twice when pressed. So when I press the Finnish special letters ä, ö or å once, it inputs the character twice. This is quite annoying, and I would highly appreciate any solutions or workarounds to remedy this issue.

Locale is fi_FI.UTF-8, host machine running Finnish keyboard layout. Happens with both RPi3 and 4 with two different keyboards.