Unlikely to be interference, maybe just a signal or trim issue or like you said something in your esc settings.

Not much I can do with the current Hatchet really, the shape can change a bit but component placement will have to remain the same due to size constraints. I was tempted to start the new one as soon as but I think Hatchet has a good few events left in it with a few updates. I'll get some designs/specs on the new one in the next few months , should be a huge improvement as I've learned from my mistakes.