My system is setup to auto update. I've noticed that after recent update, my VenuxGX is no longer communicating with BMV-712 Smart.
VenusGX firmware is v2.62 (20210207162854)
BMV-712 Smart firmware is v4.03.
When I've reverted back to firmware to v2.60 (20200906142058) the devices can see each other without any problems, so it is definitely some bug in the latest firmware!