Need help diagnosing a strange electrical/network issue on a 2016 Jeep Cherokee KL after replacing the power liftgate.

Original issue:
The power liftgate would open a few inches, then automatically close. I disconnected the battery for ~10 minutes to reset the system but it didn’t help. I inspected the wires going to the liftgate and all looked good. I then replaced the motorized liftgate strut which had a module inside it with a used OEM unit from another 2016 Cherokee. After replacement, the liftgate started working perfectly again.

Immediately after driving the vehicle:

• Odometer started blinking continuously
• Driver-side master window switch stopped controlling:
•  
  • Driver window
  • Front passenger window
• Passenger window still works from passenger switch
• Rear windows still work from driver window switch
• Everything worked perfectly before the liftgate replacement andbattery disconnect

Diagnostics/troubleshooting so far:

• Ran multiple PROXI alignments using AlfaOBD + VLink
• PROXI completed successfully every time but it did not fix the blinking odometer.
• I then went over the fuse's in the engine bay and pushed down on all the fuses (not sure what possessed me to do this but the next PROXI alignment worked.
• Blinking odometer is now gone after PROXI
• BCM communicates normally
• Liftgate module communicates normally
• Passenger Door Module communicates normally
• Passenger Door Module has U0199 (“Lost Communication With Door Module”)
• AlfaOBD CANNOT communicate with the Driver Door Module (DDM)

Things I’ve checked/tested:

• Visually checked fuse F38 (good)
• Visually inspected driver door harness in rubber boot between door/body
• No visible broken wires
• Performed wiggle test on harness with ignition ON → no change
• Removed door panel and replaced DDM with another used OEM DDM from junkyard
• Same exact symptoms with replacement DDM
• Still cannot communicate with DDM after replacement

Additional notes:

• Issue started BEFORE touching the driver door panel or DDM connectors, so I don’t think I caused a pin/connector issue during diagnosis
• Since TWO different DDMs behave the exact same way, I’m starting to suspect either:
•  
  • DDM power/ground issue
  • CAN communication issue between BCM/body harness and DDM
  • BCM not waking/addressing DDM properly after battery disconnect/PROXI event

At this point I’m planning to:

• Verify power and ground directly at DDM connector
• Check CAN voltages/continuity on DDM CAN pair
• Inspect body-to-door harness connector more closely

Only problem is im not sure how to do these things but i guess ill learn. Would appreciate any advice from anyone familiar with KL Cherokees, Chrysler CAN networks, or weird post-PROXI/battery disconnect issues.