So I've noticed that when retraining my multiclass character one of his 2 Abilities chosen at the character creation will be gone. In my case I was playing a Swashbuckler (Fighter/Rogue) and after retraining only the Rogue's "Escape" ability remained and I had to learn the Fighter's "Disciplined Barrage" ability anew at level 2, effectively losing one ability point.

To confirm my suspicion I took screenshots of my ability screens and tried to retrain and just learn the exact same abilities again, but ended up being exactly 1 point short.

This is - in my opinion - a pretty big bug. Hope this will get fixed in the future.

Other than that - great game.

I have also encountered this bug, and I'm playing a swashbuckler as well.

 

Crippling strike remained after retraining but not disciplined barrage, which led to minus one point in total.

My singel class chanter is losing his first summon skeleton invocation.