Since updating the accesspoints to firmware 1.0.4 (released earlier this week) the issues are gone

@Vincent-TP Yes, it's like that. I also got a rendered D2 version of my topology where U = untagged and T = tagged. The relevant one with my apple tv, printer and personal devices is pvid 10.

@Vincent-TP All other network access (including internet) works fine. Pinging to the printer works fine as well, even when connecting with AirPrint doesn't work. Just tried the same thing with...

This did gave me another idea. I just configured eth2 on one of the accesspoints to untagged vlan 10 and connected the printer (my macbook is also in that vlan on eth1). And it works fine when I do...

@Vincent-TP The printer(Brother HL-L2370DN) has no wifi

I think so. It says type essentials next to the organization name in the list.