Omnia crash&reboots on ssh command when being on wan, all ok without wan

dear forum,

I have latest 6.4.4. on my RTROMO1,also with PCIE sata card installed and when router is just standalone it works stable. But as soon I connect it to WAN (POE 5GHz antenna) it slows down wifi and when being on ssh console and type lspci, it stuck for a while and then reboots.
tried to find some log but nothing found…

any suggestions please what to do ?

b.r. AS.

A good place to start is tailing dmesg (dmesg -w). You’ll need to install a real dmesg if you can. The default is BusyBox.