A lots of invisible walls, especially at the end of act 1 (didn't try the others acts ATM). A lots of invisible monsters, even rares and bosses ! I know they are here because of the sound they are making, or map markers, but they're not appearing in game. I can hit them [i can see their health bar when they have taken at least 1hp dmg], they can die and loot stuff, but they stay static (when wounded, the health bar will not move).

It seems to appear with only certain types of monsters, some bosses (can't remember their name, sorry about that but the first time i had this bug was with the boss of tutorial part). i've also heard some "dogs" barking, without seeing them at mid-act 1.

I play my offline character AND I HAVEN'T EDITED MY SAVE. Hope you gonna fix it soon, because the game looks very easy if some bosses can't fight ...