We cannot simulate your case in our lab. Can you send us a diagnostic report of this case on both devices by creating support ticket? Also please enable the remote assistance on both devices. Thanks.
This one turned out to be a Cisco configuration issue on customer’s side, not on the Peplink Balances’ side.
“Layer 2 Bonding with dynamic routing protocol (EIGRP) on the LAN” is supported with Peplink Balances.