Failed to flush change tracking data. Using full scan increm

[pacorus]

Failed to flush change tracking data. Using full scan incremental run.

This message appears every time I run the backup job.
The infrastructure is located in another location and a VPN connection is made.
The infrastructure is a cluster of hyper-v 2012R2 with three hosts.
Any idea of what the problem may be?
thank you very much

[nmdange]

Typically this happens if one of the cluster nodes is paused in Failover Cluster Manager.

[pacorus]

in my case it is not paused, there are 3 host in production.