found a quest bug reproduction:
Wow, that was a fun one to debug. The triggering condition was having exactly 5 gold at the end of stage while playing with “Quests are harder” ascension.
There is a quest (“Buy some ink”) where prerequisites depend on difficulty (it requires [difficulty + 5] gold). When loading the game, assignment to quest difficulty was too late, thus incorrectly including this quest into a list of available quests, screwing random selection.
freeze, happens when you upgrade Buckle Up with a rune.
Fixed