Battery Monitor loosing connection to VRM

because we have 27 MNPPT, we use an BMV unit set-up as Shunt to keep track of the Solar energy produced.
IN VRM, under device, the unit appears on a reboot then is marked as “not seen” and offers us to delete the device, meanwhile Solar energy data is properly displayed and we can track the data is in dashboard and advanced setting so clearly the GX has no issue with the device.

Is this normal, a Bug?