There's always a first time

I’ve finally found something that works on my pi4 but fails on my armx6 it’s usually a pi4 I have problems with.

I’m writing a bluetooth – usb HID adapter on a pi pico w with pairing/management done over serial for my (or any) bluetooth keyboard ie you plug the pico into any machine, you can select a device to pair over the serial interface then it remembers the pairing and automatically connects next time. It seems to work great on the XHCIdriver and DWCdriver of my pi4 and other OS but the USB has problems connecting to my Armx6. :-(