I didn’t use a full VPN, only WFP for Path of Exile 1. I left my VPN on, didn’t open the game, and went to sleep. When I woke up, I had a negative credit balance.
First sorry for this inconvenience. Unfortunately, I think your issue is related to Amazon EC2, Twitch and Mudfish and CDN and Mudfish links. Please read these documents.
However, I’d reset your mudfish credits a little bit.