Overview shows Tickets, that my Key-User doesnt see but they should

• Used Zammad version: 6.3.1.17

Hi there,

long Story short, I built a Overview for our Key-Users (we are at the beginning of using Zammad). The Key-Users should not see all Ticket (only the customer Tickets, not the tagged Tickets like internal IT etc.). So the Overview Build (not using Expert Mode) looks like this:

There you can see, that it shows 6 of the 27 Tickets as an Example.
In my Overview as Admin should there be more Tickets seen:

If you look at the User GUI there are only 3 Tickts shown:

But there are more Tickets fit in the criteria and should be seen by the User.

I really dont know if I did something wrong or if its a Bug.

Greetings
Andre