I played in my first PTQ (and got top 8!) a few weeks ago and received a warning for missing a trigger.
The situation was as follows:
It's game 3 of the last swiss round. I pass the turn with a Krallenhorde Howler after attacking, playing two creatures, playing an Evolving Wilds, and cracking it. I'm searching through my deck for a one-of basic so since it will take me a minute to find it and shuffle, I tell my opponent what I'm getting and to go ahead and take their turn while I search and shuffle. They immediately untap, upkeep, draw, play a land, and then pass the turn. I find the land, finish shuffling, and my opponent cuts.
This is where the issue happens, I put my hands on my lands, look at the board, and before untapping anything, point out that the Howler flipped back to a Duskwatch Recruiter on his upkeep and then said that on my upkeep it's going to flip back again. I have not verbally indicated passing priority or said anything up to this point. He called a judge, gave me a warning for a missed trigger.
That was the only warning I got in all of the rounds of that tournament so it didn't matter (and I won that game anyway). My question is, did I imply passing priority by touching my lands?
In general, what verbal and non-verbal actions constitute passing priority at Competitive REL?