How is the information in field "hostname" in TP-Link EAP225 Outdoor > Status > Client being derived?

The EAP seems to ignore its DNS settings completely and picks up information that is not totally wrong, but certainly not in line wit _DNS_!

Situation:

EAP225 is connected via PoE and Switch to Fritzbox 6590 (Cable. 192.168.178.1 / 255.255.255.0) as main Internet Access Router.

Name resolution is setup on Fritzbox and working when accessed from client via i.e. nslookup and server = 192.168.178.1

EAP is configured via Management > IP Settings > (x) Static with primary and secondary DNS pointing at 192.168.178.1 (Fritzbox)

What is being picked up by the EAP instead is "Netatmo-Presence-ghexhex" for my Netatmo WLAN cameras - the primary reason for installing the EAP225 Outdoor is to "boost" the outdoor WLAN coverage to make sure all cameras have sufficient signal strength.

The value i.e. "Netatmo-Presence-gfb165d" is the default Netatmo device name in the initial configuration (after factory reset, when not change during installation.

My suspicion is, that the EAP ignore his DNS settings for the purpose of populating the client information and instead polls the local network via a different protocol (Netbios?!?)

Any clues how this can be changed?