I have fitted a new P2 class loco (Lord President) with a new 21pin HM/DCC Bluetooth & DCC sound decoder and used the app on an IPhone to install all the relevant sounds for this class. This has been done on a separate piece of stand alone short track. All seems ok using Bluetooth, sounds and movement. The loco is then set to DCC mode and put on the track and works fine forwards using a Select DCC controller (upgraded to 1.6 in March by Hornby) for a good length of time. If I run the loco in reverse for about 30 seconds it becomes unresponsive and will not stop, it just keeps running. I have to kill the power to stop it. With the power back on it does not respond at all, nothing. If I use the app in Bluetooth mode the loco works. I have reinstalled all the P2 profiles numerous times, reset CV8 numerous times. Nothing seems to cure the issue. every time everything is reset - the same thing happens. I am pulling my hair out.