Router keeps disconnecting from WAN

Just got Stuff Fibre today and while I wait for their router I'm using an Orcon NF4V Firmware GURNV5.OT132A-8-NC.Orcon-R5B032.EN

For some reason the router keeps disconnecting from UFB. When this happens, the WAN and LAN1 lights on the router and ONT stay on.

Rebooting the router works every time, but then in a few minutes I disconnect again. 2nd attempt posting this as I lost connection.

I think the issue is more likely with the router than the ONT