Has anyone had success with getting a Paragon2 decoder to continue to drive the motor after loss of DCC signal with either the original or additional keep alive capacitance?

I'm having problems with a BLI Paragon2 EMD NW2 Switcher (BLI part 1205) using it's Keep Alive capacitance to continue driving the wheels when it loses the DCC signal (whether by turning off the command station track power, lifting one side of the loco or running it onto unpowered track).

DuPont built 5 of these car that were, insulated, high pressure, heating coils and a bonnet! DuPont wanted more cars to haul Ethylene glycol, so the outer skin was removed with the insulation. This left the heating coils exposed and in place! They added a manway, low pressure valves and a bottom drain.

After making some changes using JMRI, I lost the sound in the engine.  I tried resetting the decoder, both through the NCE PowerCab itself and through the ESU LokProgrammer.  Neither is resetting the decoder.

Using the NCE I select Programming Track, set CV 8 to 8, escaped out, and then take the engine off the track for 10 seconds.  Put the engine back on the track and it won't respond to 3, only the four-digit engine number I previously programmed in.  Same thing happens when using the ESU LokProgrammer.

I have a Broadway Limited NS SW-1500 switcher(jitem 3343) with a Paragon 2 sound decoder.  I have a Digitrax system and was using a UT4 throttle to run the engine.  The engine is 4 years old and has been running great until yesterday.  I was switching cars when I reversed the engine.  The engine did not move.  When I reversed the engine again it started running in the other direction at a high rate of speed.  The throttle knob was at 0.  I tried other throttles I have(DT500), DT602).  I turned system off and tried again.  Same thing.