Mopidy + iris + snapcast : pause / resume problem

I am running a very reactive mopidy + iris architecture with multiple devices at home.

I only encounter a strange behaviour when using the pause / resume action : the playback resume appears ok on iris interface but never comes back in audio.
The only way to get audio back is to skip to next song or relaunch the same from beginning.

I am running mopidy from raspberry 3 with this mopidy.conf audio output
output = tee name=t ! queue ! audioresample ! autoaudiosink t. ! audioresample ! audioconvert ! audio/x-raw,rate=48000,channels=2,format=S16LE ! filesink location=/tmp/snapfifo

Thanks in advance if somebody knows why or has a clue how to solve the problem.

Not super helpful, but I too am running into this issue using a filesink AND tcpserversink w/ mopidy and snapcast latest.