We have an Octo GX with 4 SmartSolar Charger MPPT 100/15 units connected via VE.Direct cables. The two connected to the VE.Direct ports at the very top communicate normally, but the remaining MPPT devices connected to any other VE.Direct port don't show up in the display. We have swapped the MPPT devices as well as cables in various combinations and it seems that all the VE.direct ports except the top two aren't functioning. The Octo GX firmware is 2.33, the MPPT firmware is 1.39.