Wireless keyboard issues in High Sierra

Hi, today I have started to have a problem with my wireless keyboard. Suddenly while my Mac was started and I was typing some text my keyboard started to behave strangely. Basically some keys are now triggering multiple actions:

When I press Enter system does Enter and immediately after cursor up

When I press "I" my system always prints uppercase "I" (regardless of caps lock and shift state"

When I press shift then I get printed uppercase "I"

I did reset Bluetooth, PRAM, SMC, did restart computer several times already, did turn off keyboard, did change battery there but still no luck.

I have seen this thread too but no real solution there eitherHigh Sierra upgrade causes keyboard malfunction