Hi Nick,
Thanks for your response.
Somehow, our setup is a bit different. I use network type point-to-point to bypass DR/BDR election. Also, I notice on your CHR, your timers are set to 200ms, while VYOS are set to 100ms. Any reason why you intentionally did not made it the same?
My BFD with OSPF session were stable for 5 days between VYOS LTS and Mikrotik ROS6.49.3, then I flapped the interface today, and I get the same problem again. See logs.
I flapped the interfaces multiple times, and it did not came back. I then set the timers on the Mikrotik to 200ms, and it came back. Attempted to reproduce the issue with 100ms setting on vyos and 200ms setting on Mikrotik by flapping interfaces & removing VLAN on the L2 switch,
Adjusted VYOS to use 200ms timers, attempted to reproduce the issue, and I am unable anymore. So seems like aggressive timers is the cause of the issue.
Have you done some testing for ROS7 too?