Another thing... I was running the above engine by simply adding the vehicle in TrainController using its address (5). Is there a need to also add the engine within CS2?

Peter

I experienced the same feature on another engine with an old Roco 10738 decoder. In the #3 post by member "H0" in the Configuring a Roco AC locomotive thread, it was suggested to test an address above 255. This did the trick with the Roco 10738 decoder! However, it didn't help for the Uhlenbrock 76500 decoder which seems to be broken... My dealer suggested a Zimo MX630 decoder (as the available space is pretty small), and the Ae 6/6 now works great! I'm amazed by all the DCC CV options available...

Peter

Last weekend a friend brought a Roco VT 98 loco (using a, ESU Loksound decoder) to my layout which is controlled by an Intellibox.

We controlled it fine with address 3 under MM
Then we tried it under address 98 and DCC and we saw similar behavior. It would continually start up and reset itself.

I had address 3 called up on one controller and address 98 called up on the other speed control.
I suspected that since we had now used both addresses, the Intellibox was including both in the refresh cycle.
I selected another address on one of the controllers and after a few minutes the loco behaved itself once again.

I suspect the same is happening to you. The decoder may be switching between DCC and MM format.

Try disabling one of the two formats as suggested above.