Hello there.
I came accross some problem.
Basically i started a game, went to kill the scorpion queen, and then the game crashed as i killed it- potentially due to my computer disks being full so that's irrelevant.
The problem happened later, i started the game anew and tried to do it again. On my second playthrough the barmaid sent me to the mirror, so far so good, except that interracting with the mirror did not advance the quest.
Quitted the game started anew, same problem. Uninstalled the game, reinstalled the game, started anew, it didn't fix the issue.
That didn't prevent me to go to the tower kill the scorpion queen and finish that one quest though.
Cool game, would recommand it.
Also, when i was visiting the village i went into some house that were under the sand, and while trying to get out of the hole i glitched through the ground and into the endless void. It happened only once and only cause i was jumping underground to try to climb a slope in a narrow tunnel.