The bottom left bolt of the stack randomly heats up? Never happend to me before any clues as to why?. FYI the frame is a hyperlow cg frame with one of its mounting plate replaced by a matek bec/pdb facing down. The mounting hole tested negative from a continuity for a short but its grounded.
You could have a short across the carbon.
Check all your connections. Something isn’t right
I found the culprit however my flight controller got fried and found faulty. Thanks for you reply.
glad you found your fault…
What was it in the end?