One of the new rooms has either a healing tile (Blue), or a monster summoning tile (Red). I am on Floor 4, and standing on a healing tile, but I'm not getting any healing from it. I found a healing tile on Floor 1 that worked fine, and a monster summoning tile somewhere else on this floor, and that worked fine. Edit: Quitting the game, and closing DoD altogether does not fix the problem.
You may be resisting the heal. Some healing seems to take into account magic resistance such as potion of lively regeneration, and knit flesh. I think it is still a bug but that might explain it at least.
I thought the red ones healed, and the blue ones replenished mana. The thing that summons monsters is the room with the magic item out on a dock.
No, I didn't heal no matter how many times I stepped on it. If it were resisting the healing effect, it would have worked one of the 20+ times I stepped on it. Also, as of yet, I have not encountered the resist healing bug; healing potions, and lively regeneration potions have worked fine with me so far. Edit: Although I have noted that more often than not, my vampirism heals me for 0 HP when I attack. Might that be resisting healing?
Vampirism heal is dependent on piercing damage so enemies with resist don't heal, and as for the tile I vaguely remember something like that happening once to me.
