Gale's Blessing of Mystra from dispelling the death magic circle in Balthazar's secret library is supposed to be permanent but is lost upon respeccing him with Withers and when you move to Act 3. The problem with blessing of mystra is it gives advantage on concentration rolls but since you probably gave your caster war caster for that and advantage doesn't stack, you try to respec Gale out of War Caster for another feat but end up losing the permanent buff.
On my main character, however, I haven't lost any permanent buffs. I got Githzerai mind barrier, the Tharciate Vigor and Necromancy of Thay buff, the Shar mirror +2 stat buff, and the +2 str from the drow lady's potion for having Astarion bite her. Many saving throw buffs however are not working correctly. Got the Storm Tabernacle deity buff for donating 4k in items to Mielikki, and the saving throw buffs are not stacking properly. I am missing out on 2-3 extra saving throws on some.
