If you think about it, your ESC shares the same Earth/-ve as your RX...



Recently I've been cutting little squares of tincan from Coke & beer cans, make them the footprint of your RX or ESC.

Then when you stick stuff on using doubled-up servo tape, put a
piece of metal between the 2 layers of tape:

RX
----- tape
==== (tincan slice)
----- tape
carbon chassis


Seems to help in many glitching circumstances.