I understand that the issue gets fixed by itself, which means it may not be a configuration issue, but the actual packets with higher size is getting dropped in transit.
For example, lets say one of the network flaps on your HubSide, when it is sending an LSupdate packet, it may be with a higher size than what is supported by the path .
You mentioned MTU of 1300, are you able to ping with 1300bytes across the link?
Execute below from Hub and then repeat from Spoke side (change the IPs).
execute ping-options data-size 1300
execute ping-options df-bit yes
execute ping <Spoke IP>
- Have you found a solution? Then give your helper a "Kudos" and mark the solution.