Mysqueezebox apps not showing up in remote control app

Hi,

this is probably old news, but I have to ask anyway:

I'm running LMS 7.9 on an Odroid U3. May Players are Squeezelite (one on the Odroid, two PiCorePlayers) and one Squeezebox Radio.
I use 3rd Party Plugins like Spotify, Google Music and Qobuz and Mysqueezebox.com apps like Deezer and Wimp.

Now, my problem is, that I can use the plugins/apps on my PiCorePlayers without problem, but on the "Server" device I can only use the 3rd Party apps. Wimp and Deezer don't show up in any of my Remote Control apps (Android, Squeeze Control and Orange Squeeze, Original Logitech app).
I have no idea why that is. In the LMS Webinterface they all work perfectly, but none of my remote apps shows the mysb apps running right on the server device. That's pretty annoying, and also very confusing.

I hope there's an easy fix for this!

Thanks.