Posting this for anyone who might run into the problem and is researching it here down the road. I got a new p09 9mm earlier this year, pretty much immediately got full CGW kit in it; but then with the next few range trips, somewhere around 30-50 rounds in, the reset would hang up--first gritty and gross, then just getting caught--I could advance trigger shoe with forward pressure but it'd catch again w/next shot. Field strip--no apparent problem, reassemble, no problem for another 10+ shots, then stuck again. What was killing me was I couldn't reproduce it w/dry fire under any circumstance, making diagnosis a real SOB.
Long story short, after 10+ rounds of part swapping with my other couple omegas and then range trips, with a conversation with David in between, I did 100% confirm that the OEM trigger bar support spring was the culprit; really surprising as there was no visible or tactile evidence (to me) that it shouldn't work. It even worked for 50+ rounds in my P-07 fine, but as soon as back in P-09, nope. Got replacement from David, now have 150 flawless rounds through it. I wonder if somehow it wasn't popping out of position during firing, but then sliding back in during field stripping, dunno, either way fixed and I'm happy.
Offered for your consideration--good luck, be safe.