Hello,
I have more information to share with this site. I used Log Viewer to get this information. I think I see why this is being skipped.
Jul 28 20:31:39 astroberry kernel: [ 5638.530880] usb 1-1.2: new full-speed USB device number 6 using dwc_otg
Jul 28 20:31:39 astroberry kernel: [ 5638.663322] usb 1-1.2: New USB device found, idVendor=1546, idProduct=01a7
Jul 28 20:31:39 astroberry kernel: [ 5638.663338] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jul 28 20:31:39 astroberry kernel: [ 5638.663347] usb 1-1.2: Product: u-blox 7 - GPS/GNSS Receiver
Jul 28 20:31:39 astroberry kernel: [ 5638.663356] usb 1-1.2: Manufacturer: u-blox AG -
www.u-blox.com
Jul 28 20:31:39 astroberry kernel: [ 5638.664469] cdc_acm 1-1.2:1.0: ttyACM0: USB ACM device
Jul 28 20:31:39 astroberry mtp-probe: checking bus 1, device 6: "/sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2"
Jul 28 20:31:39 astroberry mtp-probe: bus: 1, device: 6 was not an MTP device
Jul 28 20:31:39 astroberry upowerd[1390]: unhandled action 'bind' on /sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2:1.1
Jul 28 20:31:39 astroberry upowerd[1390]: unhandled action 'bind' on /sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2:1.0
Jul 28 20:31:39 astroberry systemd[1]: Starting Manage ttyACM0 for GPS daemon...
Jul 28 20:31:39 astroberry upowerd[1390]: unhandled action 'bind' on /sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2
Jul 28 20:31:39 astroberry systemd[1]: Started Manage ttyACM0 for GPS daemon.
Jul 28 20:31:50 astroberry ModemManager[599]: <info> [device /sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2] creating modem with plugin 'u-blox' and '1' ports
Jul 28 20:31:50 astroberry ModemManager[599]: <warn> Could not grab port (tty/ttyACM0): 'Cannot add port 'tty/ttyACM0', unhandled serial type'
Jul 28 20:31:50 astroberry ModemManager[599]: <warn> Couldn't create modem for device '/sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2': Failed to find primary AT port