Start vehicle and it will shift into PRND and you can run through 1234

After a minute or two it goes into neutral regardless of the gear position. At this point you can no longer run through 1234 but can still shift DNRP and the changes are reflected on the instrument console.

Shutting it off for a few minutes allows you to repeat the process but if you shut it off and restart right away it is just in neutral.

No codes present
Fluid level ok and does not smell burned
No odd noises
No previous symptoms
Examined plug and found it wet. Replaced socket and cleaned connector well.
Examined harness and TCM found both wet and cleaned thoroughly.

Any ideas on how to determine if the issue may be the connector plate or valve body???

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1971 Porsche 911 Targa RSR rep.
1968 BMW R60/2
1981 BMW R80GS-PD, dual plugs, 1000cc jugs, 10 gal "Gaston" tank.
1982 BMW R80GS-PD, duplicate of above.
1988 Neoplan/Mercedes 40' Bus
2002 SLK32 AMG
2013 Smart Electric