Depending on the song, there will be no sound from one of the speakers.

Be sure the 3.5 mm plug has been fully inserted into the line-in port on the Five. You might also try changing the Audio Compression setting to Compressed or Automatic in the Sonos app and adjusting the Audio Delay setting under the Line-In settings of the Five to see if it makes any difference.

Thank you for your reply.
But I tried everything you wrote and it didn't change.

Is it repeatable: does it happen every time with the same track? Might it be a wifi issue? Maybe send Sonos a Diagnostics report after it’s happened, and then contact Support?

Thanks for the advice.
When I input the line to the other speaker, I can hear the sound from both speakers!

Thanks for the reply. I'll consider contacting support if I run into problems again.

When I played a specific record, there was no sound from one of the speakers again. Is this a problem with the record?

Has this worked fine in the past and suddenly had a problem, or have you just started using the turntable?

Does the cord have a stereo 3.5mm jack?

Thank you for your reply.It has a stereo 3.5mm jack.When I bought a record, suddenly one of the Fives stopped producing sound. I got the same symptom when I played another record.I replaced the speakers connected to the turntable and it was fixed, but when I played the record that had the problem, I could only hear one again.

The fact that it happens with either speaker suggests to me that there is no hardware fault with the line-in ports on the Fives.  Is it just this record?  Do other records play fine through both speakers?  Do other sources play fine (e.g. radio)?

I can’t help wondering if it is the cord/connector that has an intermittent issue, but that depends a bit on your answers to my questions.