I had a bad burn this summer on a trane HP and got handed a one way drier and said....hey this ain't right.
Trane said its correct we want drier back in oem spot before OD txv. I say ok and took drier put in back of van.
Guess they didn't think it would be a problem to not run freon through drier until winter.
I installed suction line hh core and liquid hh cord biflow and oil was still slightly acidic after 2-3 hrs but came up neutral after 24 hrs.
trane used one way driers in the units that have the check valve in the xe units they have one drier in the xl they have 2 ,on the newer units that dont have the check valve they use a biflow drier . sounds like you found what killed the compressor