I had similar problems using a battle switch with a BR6000 in hornet operating the disc. Im not sure if its the same problem but the battleswitch would twitch on and off. Cant remember who it was but someone suggested using a dedicated BEC along with the battleswitch (I was previously just using the BEC from an electronize) and it worked fine.

I have also heard of using a failsafe such as an FS1 in between the battleswitch and Rx but I cant tell you if this will work.

Bit of experimentation in order!