Healer spells sometimes not working

[niar3tir]

Description
==========

Found two separate bugs so far:
1) tried casting the mass heal spell using the spontaneous casting option, did not gain any hitpoints. It did the full animation/vfx effect, updated the piety tick, but no healing.
Tried reproducing with different spontaneous spells (heal and healing circle), everything worked as intended.
Tried casting mass heal a second time, not working.


2) Improved Invisibilty (from trickery domain) sometimes lasts less turns that it is supposed to.
The invisibility effect seems to function normally, the concealment effect should lasts turn/lvl; casted imp.invisibility after another spell that lasts turn/lvl (bless, shield of faith, regeneration), the concealment effect disappears way sooner.


The imp. invisibility bug has been going on for a few days now, the mass heal is a recent one. Luckily it does not happen everytime, just enough to be noticed.
Will provide screenshots in the future.
Thanks

[Spriggan Bride]

I was having the improved invisibility problem on a healer over a year ago, it would just be gone a few rounds after casting. I suspected at the time that darkness was canceling the concealment effect but never proved it. It's odd as improved invisibility on a wizard or assassin doesn't seem to have the same issue.