For some reason my character running just Compleat Essential Skills v1.3b for mods has developed an issue where his base vision radius is permanently set to -2. I'm thinking this is probably something that popped up from me spamming cantrip to get stacks of True Arcane Glory. Is there some way to force the character to generate fresh from start applying solely skill choices and current buffs/debuffs? I've got a ring partially mitigating it but this is seriously annoying for a mage character. The save file for reference is here (marvel at my inventive naming procedures).
You might want to post this in the thread for that mod. I can't definitively confirm that the bug is associated with that mod, but I have not heard of this one before, so it's likely.