Last Command Time of Client doesnt update after a send refresh or action execution

In my environment, I have a custom analysis that returns the ‘last command time’ of the clients.
I use this to know if a computer is or is not receiving UDP commands.

Well, for two clients, this property is always returning <error>, even while receiving UDP and action commands with success.

This behavior is happening only on two clients. Both with 9.2.10 client version, and Windows 2008R2.