HD4-MBX-5G gives no RSSI value when connected to 5G

Hi,

I have a Peplink MAX HD4 MBX 5G and imported 4 sims with different antennas to be tested. But when the cellular is connected with 5G, the RSSI value dissapears. I’m on firmware version 8.4.0 build 5736. I had the same issue with firmware version 8.3.0 build 5584.

Am I missing something? or is this a bug?