#4 on the picture above is Servo channels. I discovered that only 8 of there are working as expected. The 4 last ones have GPIO 34-39 that failed in testing – and reading small notes in the datasheet I realize that I have missed out a “input only” note on these pins.
I actually need 12 servos on the Utility Driver, so I will need to grab 4 channels from H-bridges or PWM. I probably need to re-think the Utility Driver(s) a bit.