Ack! This is me being stupid. I did some changes to how certain spell instances were carried over between zones, where I sorted them and gave them new IDs in a serial range starting from 0. The reason for this was that some enemies, Winter being one of them, needs to be able to "reserve" large series of IDs so that clients can create stuff on their own (otherwise the server would need to send instancing information of every single ice spike, which would cause a lot of lag and visual errors).
Long story short... I forgot to actually increment the ID-pool after sorting the spells, so what end up happening is that Winter will delete all persistent spells during his first few Fist moves!
Sorry for this! It will be fixed in the next patch!
