Steps to reproduce:

1. Scenario is full datastore on vCenter with multiple hosts - VMware FQDN Template is linked. 
2. Each host has access to all Datastores
3. A datastore is full

Result:

Each Host will trigger datastore is critically full trigger 

vCenter (to which the template is linked) will report datastore is critically full

Expected:
One trigger potentially on vCenter or highest common level to notify the datastore is full (Dependencies?)