Freightliner Cascadia 2023 SCR Issue

Hello there good people
I have Freightliner Cascadia 2023 with DD15 and truck went into Stage 2 - Torque Derate for some reason
5 minutes after, on the dashboard i found couple of fault codes related to DEF System. DEF Level was just a bit below the maximum.

Went at the closest Speedco and they did SCR Test and Forced Regen, and unit passed SCR Test. Forced Regen was also sucessful but codes won't go away. And they can't delete the codes ( Picture of codes attached ).

What it could be ?

 

Thank you guys.
Truck is still at the dealership, i'm waiting for their answer on the situation.
Do you think these codes could have something in common with codes for injector ?
I had couple of fault codes recently for Injector No.6 - Electrical issue.

 

Dealership said it's cause of Rear Injector harness.
He will replace it.
Don't know yet how Injector wiring is connected to DEF Issues ?

 

I thought also they're talking about DEF Doser harness but i recalled i had couple of weeks ago codes on dashboard for Injector 6 Open circuit
So i called again just to double check and they said it's Fuel Injector harness which is causing the trouble

 

Lol..Now they found out whenever Jake Brake is on, regen process kicks in
How these two are actually connected lol..