I'm interested to see what happens if you swap the seat memory module from the sports to the comfort seats.

Have you tried putting just the passenger Sport seat in, and the drivers comfort seat, to see if the issue is related to just the drivers seat (indicating tensioner, etc)?

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards