TriggerTech Failures? Hang fires?

Well, I just got back from the range this morning and my TT special took a shit the same way, around 550 shots in. Trigger is in a rifle I purchased from Alamo Precision, Defiance anti action in 6.5 creedmoor. Found this thread looking for probable causes... sucks...
Unfortunately happened to me last week
all my rifle have TT trigger I never had problems
Few months go I build 6 gt whit impact precision action and I have problem whit TT trigger
 
All my TT are 2 stages and I haven’t had a problem with these.
I did have issues with the Diamond 1 stage on my RimX which I now have replaced with a BnA Tacsport pro +
 
That is true for me as well, I keep forgetting the single stage AR Diamond that quit resetting after 12 shots. I threw it in the trash and put a 2 stage Diamond on it and 500-600 rounds later all is well.