Hello,
I have had problems with quests resetting too quickly. Sometimes, I will be back in the quest in less than 90 seconds, to find that it will have reset. This is obviously extremely frustrating. I started using an egg timer or stop watch to validate my timing. I am 100% certain that I am faster than 5 minutes. I do 100% solo, which is why this is an issue.
It's not a 100% repro, but here's what the problem seems to be:
1) It occurs in quests in 'wilderness' areas -- where you have to pass from the city, to the wilderness area, to the quest,
AND (not or)
2) You someone your hirling in the *wilderness* area, not the *quest* area.