Thought I might as well add it as it's pretty game breaking if it happens. (Luckily I was able to revert to a previous save and avoid it the second time).
Here's a basic description (should be spoiler free):
- Happened shortly after completing the second last College of Winterhold quest.
- I am wondering if it was to do with a certain item you acquire upon finishing this quest that gives you 100% magic regeneration.
- Very easy to replicate once it happens, you can basically just hold on one or both spell buttons and continuously cast even though the magic bar is empty.
If anyone else has experienced this please post so hopefully it can be fixed in a future update.
Thanks!
