Hi, I just realized, that the XP Bank is nit working as intended. Whenever you store your XP, one Level gets removed from you and you cam then withdraw it and increase your level since it does not take more than one level on depositing XP.
Also the bar is not working as intended I guess.

I have an other issue with it. It shows I have 0 XP.

Oh, and also I can't get it to put the XP into a Tank with a pipe

Fixed in v5.0.0