I had old GHF411.

Checked FETs for short. It was OK.
I rebuilt a 1203 2.5" toothpick

All motors were OK.

Betaflight motors tab.
Spinned up each motor.. direction OK.

Hover test.. flew.. a little bit.
Then Motor1 stopped turning, and started smoking.

What the hell!!

Now it turns, but not as freely. Enamel looks kinda burned.. not like black.. just darker yellow.

checked motor pads.
No short to Gnd or Pos.

Checked motor wires. All pairs measure 0.4ohm

the affected motor doesnt spin as freely.

This is old GHF411. Im not sure what old BluJay is on it.
I suspect problem with gate driver.