Basically if you have multiple accounts the skill price can just give up and not appear when you either start the game or switch accounts, already reported this directly but I thought I’d post it here as well so I had a higher chance of it getting fixed. The bug is completely visual but annoying and the only way to fix it is to restart the game.
Edit: Appearantly it can happen even with one account, for me it only started when I made my alt but that might have been a coincidence