Not sure why it happens but noticed it through a couple gameplays. Usually for my early warriors ill make up a couple +3 silver weapons to replace early game weapons when i get the crafting skills and items to do so, but a few times i've noticed that when using my druids "flame weapon" spell that grants 1-8 fire damage, for some reason it will bug out and stay permanent on the weapon as a new feature.

Now you might say thats a good thing, free 1-8 fire damage, but sadly I want to put acid or electrical on a weapon since fire/cold seems to be less effective later on, but now those nice greatswords, etc that i'm making up to build up have the flame weapon property permanent. Currently I have 2 weapons this has happened on.

Does anyone know of any current bugs or reasons this would happen. I did some research and it seems long ago with problems with bless spells and holy factors and such having permanent issues but i haven't found anything about the flame weapon druid spell. I guess i can just console command later when i want an upgrade i actually want, but it would be good not to run into this problem if i can help it in the future.