[iOS iPhone6s] TEAC Network player does no longer show up under available devices.

[pguillau01]

Plan

Premium

Country

Belgium

Device

iPhone 6s

Operating System

iOS 12.4.1

My Question or Issue

Since 1 or 2 months, the spotify app on my iPhone does no longer show our Teac NT-503 network player (home hifi).

While I can connect to this device with the Teac app (from the same iPhone), or even with Safari, connecting directly on the web interface of the device (using the IP adres).
My kids have android devices, and they still can connect and broadcast their music on this network player.
Until yesterday, as soon as an android device was playing music on the network player, this player instantly appears under the available devices on my iPhone.
Once the network player was listed in the available device on my iPhone, I was able to take control and to play music on my home hifi.
Since a few day, this trick even doesn't work anymore ??

I've tried :
- Restart wifi and router
- Re-install spotify app on iphone
- Delete cache

All ideas and support to fix this issue are welcome.

Thanks.