So I updated my Sonos app to S1 this morning and then my speakers.
At the end of the update all my speakers were showing.
Went to play some music and all grouped except my play:5 (1st gen).
Went to go add the play:5 again to the group and it was gone.
Play:5 just showing a white light.
Restarted the play:5 and still won’t add.
Factory reset the play:5 and added it again, it showed up!
Went to play some music and it disappeared again.
Restarted my WiFi just in case.
All work fine except this play:5. Annoying thing is it was working fine this morning before the S1 update :(