"During a fast" doesn't surprise, my own passions are much worse when fasting! When my Priest helps me with a talk, or a meeting, I get much more judgemental about him for a few weeks nearly without fail - it is frustrating.
Priestmonk Fr Kosmas (of Australia and Orthodox Talks series) states this is the enemy putting thoughts into your head, and loves getting you away from people who care for your soul. Everyone has passions, so you need to ignore the thoughts, fight them / struggle with them, or confess the thoughts if they get too big (3 stages, ignore, fight, confess). "If you are reading or listening to something spiritual and get a stupid thought, ignore it - normally you won't even remember in 5 minutes."
Every Priest is a person, so has passions as well, and the enemy will put annoyances in your head. Even the annoyances are 'true' he still has the priesthood (same for Bishops, which I've been judgey on lately - Lord have mercy).
A nice story Fr Kosmas brings up is someone who was annoyed at his priest, or said 'well he said some weird things' (can't recall which Saint dictated this). In the example, the man had a dream, found stream of beautiful water in the forest, crystal clear and refreshing. Wanting to find the source of the stream / brook - he rounded a corner, found it emanating from a dead, diseased dog. He was disgusted, and an Angel appeared, said "it doesn't matter if the priest is 'a dead dog' they are still ordained with the prietshood." This is heavily paraphrased.
Also your phrase "obedience" is odd, I thought I was also under "obedience" to my local parish priest - because I was reading too many monastic books. When I brought it up, he laughed - "you aren't under obedience" and corrected some other stupid thoughts I was having. This is a monastic thing, so careful of that unless you have a explicit Spiritual Father / Obedience relationship, which someone else would need to time in. [Edit, this is still something I'm unclear on I guess]
I'm just a struggling catechumen, so YMMV
