I'm not sure, if this bug was reported wrongly multiple times, because it's not a bug, it's a missing feature. So each time someone said "If I press INSERT nothing pastes in the textfields", moderators replied with "works as intended". So I think why they said, that it work as intended, is because there's no paste function for INSERT.

So I think there should be a paste function ran when clicking INSERT, or simply SHIFT + FN + INSERT or just SHIFT + INSERT.

Alt codes also didn't existed in the game before but now they do, so.