Inexplicable Reduction in Resistances in a Map

For the sake of simplicity, let's focus on Lightning resistances:

Stats in hideout


Stats in map


Map


Auras -- I don't have any that grant resistances


I don't see any conditionals, aside from "While holding a shield"... so what gives?

And the reductions are kind of odd... -49% to Cold and -47% to Lightning, but 0% to Fire?

And it isn't the first time this happened and I couldn't decipher it last time either (the numbers, by the way, were exactly the same).

I am missing something super-obvious, so help me out here.

Eldritch Altar downsides on "Player Gains:" choices.

Exarch has a -fire/chaos resist downside, Eater has a -cold/lightning resist downside.

You can review taken altars by hovering over the icon above the skill bar, in the bottom right.

Knew I was forgetting something... Thank you. I am taking these without even looking most of the time... Spell suppression is nice :)

:facepalm: