BMV700, working but no longer seen by EasySolar

BMV700, has been monitoring AGM batteries for several years, suddenly vanished from visibility in my offgrid EasySolar IIgx 48/5000/70 12 days ago and has not come back.

The BMV700 still appears to be working: shows %charged, responds to button presses.

I have removed and replaced the VE-Direct cable at both ends, several times each.

I have rebooted the GX device several times today (Console; Device List (not showing BMV); Settings; General; Reboot).

The system is operating as expected otherwise. Firmware is all up to date: Gateway v3.67, solar charger v3.16, VE.Bus system 2623558

Can you suggest anything I can do to resolve this?