I don't know if anyone else experiencing this, but so far It seems like I'm the only one. Sometimes , out of a sudden, my Light Armor passive Evocation stops working. All the other passives work normally.
I wear 5 light armor with seducer set (another 8% reduction cost). So I'll take Engulfing Flames as an example. Without any armor on, it costs 280 magicka. With my armor on, and without the bug, it costs 216 magicka. When the bug hits, the cost goes up to 258 magicka. As if I'm not wearing any Light Armor at all, but the seducer set still working. Removing my armor and placing it on will only increase spell cost to 280 then back to 258, unless I zone out of the area, the skills' cost goes back to 216 magicka.
Zoning into any area, or logging in, always resets my spell cost to 216 magicka. However, as soon as I hit an enemy, the cost goes up to 258 magicka. So even if I see my spell cost is normal when I first log in, it doesn't mean I'm not bugged. I know whether I'm bugged when I first engage in combat.
So anyone else realized this? Or is it just me?
PS: I don't use any add-ons at all.