Quote Originally Posted by Gusse View Post
P-FET gate (+ 56k pull-up to VCC)
Try a MUCH smaller resistor. ~4.7K

The rise time needs to be fast enough to avoid the R-M-W issue Henrik talked about.
The other pins are driven high in a matter of nanoseconds.
A 56K resistor will probably take much longer.

I think this i a real bug, but don't know is it in PBP or somewhere else.
It's not a bug in PBP. It's just the way the hardware works.