This happend a while ago already.
Currently when using the quester on 2.4.3, it will sometimes skip quest steps until I restart it.
In the "Bot state:" it show that it's at TurnIn something, for example, then actually grinds for the next quest. Sometimes when restarting after a long time, it will go back to finish one quest 2 zones ago.
It's a bit odd and I'm not sure what could cause it.