Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - General 10 (or so?) Broken Achievements

I didn't get the Seven Altars one either and I'm playing solo. I prayed in all of them and granting the gods wishes as Lohse... I thought it was because I used Sebille to pray at the Elven Altar and after that the altar wouldn't say anything to Lohse OR because after I killed the Master (got that achievement) I accidently found the secret entrance to the Academy (I entered the tunnel, tried to open the door and noticed my companions had to be persuaded and got the achievement discovering the entry, so I reloaded to the point before I clicked on the door and went back outside the secret entrance) and perhaps that broke things, because I killed the Mother with Sebille and didn't get the achievement, entered the Academy through the front door and didn't get the achievement, conviced my party members to support me with persuasion and didn't get the achievement, conviced Alexandar to support me and didn't get that achievement, entered and escaped the Arena of the One (both of them) and didn't get the achievement...

When I found out I missed so many achievements, the next day I renounced to my progress and reloaded to the point just before entering the Academy throught the front door. I conviced my party and entered and BAM got both achievements... I play on GOG, and some weird things have been happening there lately, so perhaps that's the problem for me... Turns out I missed many achievements despite doing unknowingly exactly what you're supposed to do to get them, like Thunders of the Upper Deep, A Good and Faithful Servant and Iniquity Forgiven...