These are the bugs I encountered playing the game:

I

I had looped dialogues in two instances.

1. Nadira - he gave me a coin as a thank you, after which the dialogue ended and a second scene automatically appeared. I had to talk to Nadira about her saving her again and about the coin she wanted to give me. But this time Nadira said she was pick pocketed and can't give it me.
2. Volo - first conversation in the goblin camp was never ending. I was able to pick every dialogue option and the conversation wasn't progressing further. (I was able to end the conversation using "leave" option, but I was curious of all the convo options).

II

Hitting an NPC while walking by (is this even possible???)
After ending a conversation with a Tiefling Child called Mol, my team was passing him by and Mol suddenly lost half of his health. It never happened passing by other NPCs.

III

Cutscene with the gnome tied to the windmill.
- The gnome's model was invisible, only the rope was visible. Gnome appeared only after he was cut down from the windmill.

IV

Auntie Ethel quest - if it helps I tried to do it before visiting the goblin camp.
I was fighting Ethel and everything was going smooth up until I accidentally ordered Wyll to go into a puddle of grease. Wyll of course slipped and spent an entire round in it. And the game decided to have somewhat of a hiccup. I ordered Wyll to leave the greased area but after that he stopped responding to commands. When I tried to move him or attack (I clicked multiple times) he wasn't responding. Surprisingly enough the only area that was viable for him to move was back to the puddle of grease. After that the entire A.I. system fell apart. All the characters (my team and enemies) started to pass their turns and the battle turned into an endless loop of inactivity.

I reloaded a previous save file (from before the combat started) trying to resolve the quest differently. I discovered a secret door in the fireplace. Suddenly Ethel appeared in her true form. Cutscene froze and disappeared. Ethel was also gone and all the item in the room became inactive/unclickable, so I wasn't able to progress any further.

V

The worst bug that I encountered so far:
- Shadowheart wanished from the party.
I recruited Shadowheart at the very beginning of the game. It was all going well until I had to decide whom to kick from the party so to bring Lae'zel with me. I returned to the camp with the party and at the camp I told Shadowheart to wait there for now. I took Lae'zel in her place. After at least several hours of gameplay I returned to the camp and Shadowheart wasn't there anymore.
I was able to find her again in the Tiefling camp, but she was behaving like she was never recruited in the first place.

VI

Racial descriptor bug.
When talking to Ethel about Mayrina I was given the racial dialogue option [Human] despite the fact I was playing a Tiefling.

VII

Halsin bug. (This is a bug I did not experience myself, but I was asked to add in the report)

"I found Halsin in the goblin camp in his bear form. I did not help the goblin children throw rocks at him. I actually went against them, so when the combat started and Halsin got free. He froze. As in, he was standing in the middle of the dungeon not attacking or moving just passing turns and being a big target for the goblins. I was able to dispatch all the enemies and immediately after the combat ended Halsin returned to him elven form and accused me of a crime and wanted to arrest me. I was able to convince him through a die roll to let me off the hook, but was baffled of what crime he was speaking off."