Multiple apps

This is a very recent problem...hoping one of you may have a fix.

QB in the kitchen...Atom in the lounge.

When playing Tidal in the kitchen, music cuts after the playing song is finished if another song is played in the lounge....works both ways.

At first I thought it was wifes app in kitchen, and perhaps running two apps simultaneously wasn't a good thing. So tried choosing different tunes on one app for both sources. Still the same.

It never used to be a problem...started a week ago.

Anyone any ideas!?

Atom is hardwired, qb is on the network.

i know multiroom between the two is still being worked on, but I'm using them as separate units on the same network hub.

i'm thinking a license thing through tidal and playing two at once, but as I said it was never a problem.

Cheers for any advice.