jp1 Removed, board still powered with ESC?

I’m a bit confused about this, I was under the impression removing the jp1 jumper isolated the output + rail, allowing the user to power the board with, and only with the Power Module.
However with my jp1 jumper removed the board will still power up from the ESCs.
I have insured many times that there is absolutely no external connections between the input, analog, and output rails.

using a search I was able to find another pilot with this issue, but it had he replies. viewtopic.php?f=44&t=7365&p=15762&hilit=jp1+jumper+removed#p15762

Thanks for any help

@midnightdaylight,
Is your board a genuine 3DR APM or a clone? If it is a clone, that may be the answer to your issue.
Also, are you sure that you have the correct jumper removed from the board. There are other jumpers on the board.
Regards,
TCIII GM