scr warmup

[Mudflap77]

Hello all, My 2350 seems to want to run in SCR warmup excessively. Today I had a chance to play around with it with insite hooked up.
Start up the truck SCR warm up mode until SCR inlet temp reached 268F Outlet 284F DPF outlet 269F then went inactive.
Put the truck on high idle for 60 seconds inactive. Take it off High idle back into SCR warm up SCR inlet 269F outlet 278F DPF outlet 264F.
Go back on high idle goes inactive again until you take it off high idle.
went for a long drive bobtail starting out while it was in SCR warmup with temps as SCR inlet 269F outlet 278F DPF outlet 264F. Drove for over 30 min SCR temps were both over 410F for about 10 min then it finally went inactive about 3 miles before a stop sign. waited for a couple cars to go by got around the corner back into warmup both SCR temps above 400F for about another 20 min before it went inactive. 5 min later traffic light in town back into warm up.
While doing this warmup BS it will over boost to 40 psi if not watching closely.
DOC/DPF and SCR were changed last year along with turbo and actuator, emissions harness, DEF doser, 7th injector, all emission related sensors.
With in the last month I've done the EGR tune up, pulled the EGR valve off cleaned it spic and span, not a drop of carb/choke cleaner leaks past the valve, I've blown air and cleaner in every port, all were clear. No blockages in the EGR cooler.
Cummins Original file updated while dealing with Regen issues last year. As far as I know there hasn't been another update.
OEM CAC passed the leak down.
I'm at a loss with this thing.