I moved from a B20 to a B30LTE. The B20 was connected via Verizon (dongle) and HughesNet Gen4. Worked flawlessly.
I migrated to the B30LTE, still with Verizon and Hughesnet. Now the Hughesnet WAN disconnects and then reconnects every two minutes, the disconnect being approx. 3 seconds each time.
I use the same health check as with the B20 (DNS), the same cable and the same Hughesnet modem.
Changing the modem from WAN1 to WAN2 had no effect (test in case there was a port-specific hardware problem).
As an added curio: I have tried setting the frequency of the health check to 30 minutes - and yet the connection is still reported as down and then up every two minutes.