status light new behavior

Not a problem, the green light indicates the speaker is muted.

Either don't mute it, even volume level 1 turns off tne light, or stick a dimming-dot or a piece of tape over the light.

The speakers are not muted. I was able to get them off by starting music again and stopping again. I did that after I fell asleep with the sleep timer. It defeats the purpose of the feature. 

They weren't muted?

What did the volume levels show as in the app before you played the music?

If it wasn't showing zero then you may have found an LED issue. Recreate it, submit a diagnostic and call Sonos support to get it added to the problems list.

Might do the same if it was muted, submit it as above but as a request that the speakers not be muted in that situation.

Does the sleep timer reduce the volume to zero at the end of the playing time? 
 

Regardless of whether the LED is turned on or off, it always shows green when the volume is zero. 
 

I just tried a sleep timer on a One using the current iOS app and Sonos system firmware.

The LED did not remain green. It briefly turned green when the speaker was muted due to the sleep timer, but the volume reverted back to the previous set volume.

Therefore, there has been no change in behaviour on my system in relation to the sleep timer and led status.

The volume is at 2 for sleep music. When sleep timer ends, the green status lights come on. That defeats the purpose of the toggle in settings. 

I have contacted Sonos support twice this week. All they can say is that they are not behaving properly. I already knew that as I was contacting them for help. I have a case number with no fix. 

One of the representatives said I need to factory reset the speakers. I have not done that because I thought we were not supposed to do they because data is lost. Am I right on that or wrong?

If Sonos support can't help, I don't know who can as it is their product and firmware. BTW, I am up to date on software. 

Data (for this instance, the log files stored on the speaker that would potentially show the error, and all other ‘setup’ data) would be erased. Most of this is mediated if you have other Sonos devices that it connects to, but I don’t think Sonos One SLs connect to SonosNet, and I’m too lazy to look it up at this moment. Often, the factory reset device can be helped by connecting it to your router with an Ethernet cable, at least temporarily, while it is being factory reset. It helps the device communicate properly after the WiFi (radio) information is erased by the factory reset. It will, when being reset, connect to the other Sonos devices, and copy over other ‘normal’ setup information, relieving the user from much of the manual process. it should also erase the alarm settings, since they’re stored on the speaker, and not in the controller (or the non-existent Sonos ‘cloud’).

Glad you have a case number. Since we in the public don’t have access to any hard data in your diagnostic, we’ll have to wait for Sonos to get back to you. 

If you have submitted diagnostics then Sonos already have the data to review, as long as the diagnostic was taken within 15mins of the sleep timer ending. You can easily create/amend an alarm to submit a new diagnostic if that wasn’t the case.

Assuming you still have multiple Sonos speakers in other rooms, factory resetting the stereo pair of One SLs is not a big deal. You would have to rerun Trueplay if you have that enabled and adjust EQ accordingly, but all other system settings will be copied over from your other devices when you add the speaker back to your system. You may also have a couple of “not connected” devices showing under the system view for a few days until the system refreshes.