When I first installed the trigger it did this almost every time.

Pull through the 1st stage, it stops, tightened up a bit, then moves slightly before stopping, and then with slightly more pressure would release.  I describe this as feeling like 3 stages.

Took it all out to make sure I didn't install a spring wrong, everything in the right direction etc. Put it all back together.

It would still do it intermittently a few times, and I noticed for a while it seemed to correspond with first applying pressure with the safety on, then switch to fire, then pull the trigger.

After a while it stopped doing it at all as far as I can tell right now.

Anyone else ever experience this?

Everything feels good now, I'm just curious.

Edit: still does it with the upper back on.

Edit:  Have been reading up trying to find more info:

Could it be this problem? : ProblemWithGeisseleTrigger

It does kinda feel like it should have dropped with what felt like the 2nd stage, but takes just a little bit more pressure to do so.

This sounds very similar:
2ndStageCreep?

Edit: After reading the above thread I had a hunch it was the back of the trigger rubbing on the safety, so I put in a newer safety and the problem goes away.

Sounded like safety selector rubbing. This is due to the variances in selectors. It can be easily fixed by filing the "side walls" of the safety selector a bit. DO NOT file the flat area where the trigger sits, only the "walls" on either side of the flat. To check, install the trigger, with no spring, and make sure it pivots free and smooth.