Healing mode and Life regeneration problem

[joniii]

I had a positive healing mode (>120%) and life regeneration (>3). Suddenly they are bad--51% and -4 respectively. Why?

It is not the equipment (switched all). It is not the dungeon (I was in the dungeon a long time before it happened; also tried new one).

Can certain monsters permanently destroy character's healing mode and life regeneration?

Character (if useful): level 50 human summoner; version insane.

With weak healing the character becomes virtually useless in the endgame.

It has happened two or three times in the past. I ended up discarding these characters--not only are they weaker, but even using recall is tedious (resting no longer works).

Anyone know what is going on?

[Tyren]

Did you have multiple Goedalath Rocks?

[joniii]

That was the problem. Thank you.

(I had them in storage room, picked them up to put in the vault, and forgot to do it.)