Connection issue with a host

Hello everyone,

Thanks by advance for reading my post.

I have a cluster of 4 hosts(pve v8.2.3):
PX1|2|3 in OVH DC( Gravelines)
PX4-PRA in OVH DC (Roubaix)

The last one is seen in the web UI as degraded:


I was looking for the problem when I saw an error in corosync service:
[KNET ] host: host: 1 has no active links

However after restarting the service, this message disappeared. I successfuly ping the interfaces of all host:
px4-pra => px1
=> px2...

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