I have following setup
LTE12 router with passthrough to UDM.
Everything works fine, problem starts when you perform download 2-3 gigs big file, speed drops to 0.
When replace UDM with another router (USG, Mikrotik or direct pc connection) issue is not observed.
But when connect UDM without passthrough ( double NAT) issue with download not observed.
Ubiquity support didn't provided any valuable information about that, tried to RMA UDM to the shop, they tested as "normal" router and dont find any issues.
Does any1 have similar setup and faced similar issues?
Thanks in advance.