Auto Track = Auto turnoff

[Becvar]

I keep clicking the purple Auto Track button on, but then a few minutes later, or after I turn in a quest, I look at my minimap for a route and it's gone. Look back at the quest tracker and the Auto Track has turned itself off. I don't mind turning it on every time I log in, but having to turn it back on 50 times during a quest grinding session is getting annoying. Any ideas what could cause this?