Hello.
I understand, at this moment it's impossible to remove this default filter. The wazuh plugin uses it to filter the different modules events.
Logically, this should not affect the visibility of the events. But you can try to see the events uses the opensearch discover and check if it's a filter problem.

On the opensearch discover, the cluster.node is not applied. Check if you see events and apply the cluster node filter to check if it is the problem.