I am having exactly the same issue - 12v EAF connected to RPi 4 using INDI drivers (Astroberry latest). In fact, I have two EAF's on different rigs, one still connects normally but the other is not visible to the RPi when I run lsusb in terminal my ZWO cameras are detected and everything else. It connects directly to laptop ASICAP and runs no probs, cable checked - good, power 12v directly with adapter so no shortage. Disconnected from power hub (Startech) - makes no difference. Every now and then it suddenly appears but that's 1 out of 50! Firmware updated too... Swapping between rigs - no effect. tried on vanilla RPi install with nothing else connected - still nothing. Latest RPi build - all updated so maybe that's it? No logic as other one swapped between rigs is seen by RPi and works fine.
Thinking of throwing it against the wall - will that help??
Really appreciate some help as this seems odd, worked fine for a year... what logs would assist? There are no INDI logs as it is not even seen by the RPi usb ports...