Two issues

I have had Sonos for years now and experiencing two new issues. When listening to music (on one or several speakers), the music will turn off for about 3-7 seconds and then come back on. What’s odd is, my living room is set up with a Play 5 and a Sub. When the Play 5 stops playing as described above, the sub will still play. Any thoughts on how to fix? 

The second issue is, when I am listening to music (seems mostly when using multiple speakers) randomly in the middle of a song, the song will stop and a new song in the playlist will start playing. I am the only one that has the application on my phone, so no one else is messing around and changing the song. Any thoughts? 

Thank you! Gary