Description of problem:

Twp frr peers, using bgp + bfd and echo mode enabled, echo messages do not work.

Version-Release number of selected component (if applicable):
frr-7.5-4.el8_4.2.x86_64

How reproducible:
Always

Steps to Reproduce:
I wrote a container based reproducer here https://github.com/fedepaol/bfdechoreproducer

the two frr configurations are available at
https://github.com/fedepaol/bfdechoreproducer/blob/main/peersetup/frr/frr.conf
https://github.com/fedepaol/bfdechoreproducer/blob/main/vrfsetup/frr/frr.conf

Actual results:

Expected results:

Additional info:

I tried the same scenario using the latest upstream frr and it works as expected.