Strength Domain
Character: Zalka Rift GirlBoss replacement
As per Wiki it should grant +5 on bull strength, but when the PC casts, it is always +4.
"Some domains improve the Enhance Ability spell to grant +5 to an ability score, instead of +4; this bonus is only available to "pure" Clerics, who are not multiclassing."
https://wiki.efupw.com/index.php?title=Domains
Did you multiclass at all? :o
That's it then, I overlooked it, not a bug. Thank you! :)