SCX10 Deadbolt turning off when vertical or upsidedown

[Keplinger]

I have a couple month old scx Deadbolt. Im still using the stock esc (AE-5) and a high turn integy motor. I just developed a problem where the motor will no longer operate when the rc goes vertical or roll's over. This did just begin after a installed a Castle BEC to operate a higher voltage servo. I wired the BEC in and directly powered the servo, leaving the stock esc's BEC to operate the receiver. The install went smooth and powered right up and worked great first try. I have to lean toward the install of the BEC affecting something causing the issue to happen, but im unsure what else to check. I am also wondering if the ESC is starting to die...idk. I just wanted to see if anyone else has seen an issue like this. Thanks for everyones time.

[Keplinger]

Well, after fiddling with the way the main battery wires lay with the lid on the truck, i just tested it out and it ran upsidedown for a good min, no stopping. I guess i have a wonky connection somewhere in my tamiya plug...need to update that connector to deans plug, something tighter anyway...