2020 Cascadia One Box Keeps Falling

2020 Cascadia DD15
700,000 miles.
Fourth One Box
Third One Box caught fire after 20,000 miles.
Fourth One Box has less than 100k on it and keeps burning up sensors and requiring frequent forced regeneration.
Is this a lemon or a bad design?
Any help would be great!

 

It's been in 7 dealer shops and 3 company shops. All new injectors. Valve lash. Filters. Pressure tests. Turbo. Wiring harnesses.
The one thing that always gets weird is the ECM often takes several tries to accept updates.

 

This truck has been in seven Freightliner shops and three company shops all of which have had it hooked up to a diagnostic system.
It has had the complete one box and all sensors replaced multiple times it has had all of the injectors and the fuel pumps replaced it's had multiple wire harness replaced a valve lash a turbo and a number of other things.
It's on the 4th radiator as well, not that that should be related.

 

The doser should have been replaced along with the one box but I can't say that with certainty. The diagnostic systems don't report any can bus faults but we have all kinds of weird electrical things related to the can bus.
The oddest example I can think of at the moment is for some reason the bunk heater won't work unless the dome light is on. And for some reason the blend doors between the front and back seem to both be controlled from the front, at least as far as the air conditioning goes. If the air conditioning is cranking up front you can turn the heat on in the bunk but not the other way around. If you start to turn the air conditioner to a warmer temperature up front the bunk follows.
I've had some Freightliner technicians tell me that those things are normal and some tell me they're not.