I don’t know if it was reported here already,but i’ve experienced this bug lately. When you Unlearn any spell,All other spells have their cooldown frozen,Making it impossible to use until you restart mystera,in some Occasions causing the player’s death.
The same happens sometimes when you change Area(South Sands to Galebrook for instance) and your screen Stay black until you restart your game,as before,it can cause a player’s death too.
I know Dev is working hard to fix these bugs,i hope we can have a fast answer,patchs that may fix this.