Issue ZBX-25470 refers:
We have created a network map for each of our cloud vendors to highlight any problems with their production VMs. As per the screenshot example, both maps use a host group of "virtual machines" and tags that are vendor specific.

The VMs for both vendors were discovered using LLD which has, unfortunately, assigned the VMs to the generic host group of "virtual machines". A limitation within Zabbix prevents us from retrospectively changing the assigned host group or add an additional host group for these discovered VM hosts that would allow us to provide more specific vendor filtering with the host groups field.

Although any problems that occur on one or more VMs display in the correct vendor's map as the problems can be filtered using tags, any hosts in a maintenance window for a specific vendor incorrectly show in both vendors' maps. This is due to a limitation in the maps that maintenance filtering can only be done using the host groups - not the tags.

Refer to the attached picture where Vendor 1 has 120 VMs in maintenance, but both vendor maps show the 120 VMs in maintenance. The Vendor 2 map should not make any reference to hosts in maintenance.

To improve the functionality of the maps regarding hosts in maintenance could you please introduce a feature that will allow filtering of host in maintenance using tags too.