So my character is a werewolf and I remember getting the Beast Blood active effect perk which gives disease resistance and something else, but I've just noticed the effect is now gone from the list. I'm still a werewolf as far as I know. I still have the Beast Form ability and I think the no well rested bonus. Any idea where the perk went? Is this a bug? I know I could probably just use console commands to add it back but I'm curious to know how it broke in the first place. Does traveling to Solstheim have anything to do with it? I first noticed I lost the perk when I started catching diseases over there. Thanks in advance!

What system are you on? If your on the PC are you using mods? Any that effect werewolf perks and conditions?

Example I use a werewolf mod that gives me only 50% immunity instead of 100%. No chance of catching vampirism of course.