DFCO not enabling

[FetzerValve]

I'm having trouble getting the truck to go into DFCO. After looking at my most recent log file, it appears that the truck isn't dropping the TPS far enough to enable DFCO. I've attached the log that shows in a couple of spots that the TPS is only dropping to about 15% when coasting down. It looks like all parameters to enable DFCO are being met, other than TPS. The compare file from a stock truck shows that my DFCO settings are identical, so I'm at a bit of a loss here. Any help would be greatly appreciated.

2010 Silverado 6.2
Borg S475 @ 9#
850cc Injectors

21-10-19 13-37-12.hpl
Rev. 9-FFDP from forum enabled upshift adapt.hpt

[NotSure]

Probably hitting an idle airflow floor, such as Throttle Follower or Airflow Final Min. Log idle airflow PIDS such as Follower, Desired, Minimum, Desired RPM, and Engine Torque (to compare with your Throttle Follower Torque chart).

Under Fuel/Cutoff,DFCO/Decel Fuel Cutoff, the Disable RPM Rate is at 1800. This can be raised. Right now it won't go into DFCO above 1800 rpm.
Also, in the same tab, DFCO Entry and Exit Spark - Blend Time can delay it a bit as well.