Spotify Android does not see Spotify connect of my Denon Amp

[verkoot]

Hi all,

I have the mobile android version last on of spotify on my Huawei P8.  When i try to play it remotely to my amp, a denon avrx 1200 W, on same network, i don't see it in my list, neither my ps4.  I can see it with the Denon app to control it with the mobile but.

But and that's what is strange, if i open the laptop version of Spotify, there i can see the amp and ps4 with spotify connect available, i can choose it, it works fine and then i see it also on my android mobile and it plays fine.

The question is why my android app alone does not see my amp and ps4 ? Both mobile and laptop are on same wifi, connected to the box where my amp is ethernet wire.

Thanks if i can get some help