I am also experiencing this on 6.14.2 with my ROME/rolling desktop machine which has a 10Gbit NIC, same symptoms as @pthesh described.
I booted into the prior 6.13.9 I was running and network connectivity is restored.
I have 2 other NICs and a WiFi6 adaptor in this machine I could test (yes I know, ludicrous number of NICs in one machine 
), but I do not think the result will be any different with those.
It was also affecting my qemu Cooker VM when I updated it late last night.