Alexa Voice control issue on Era 100

@Minsou 

Link to this thread… (that you have already found)

Do you have any other Alexa devices in your home?  I haven’t got any Era 100’s but I’ve noticed that my Echo Dots have become very sensitive recently and often answer instead of a Sonos device even when in a different room!

If you read the linked thread above you will see that several users tried everything possible on user side including what you suggested. The behavior discussed here also happens if you don’t use any other Alexa device besides the Era100. 
Really seems to be a software bug imho. 

That’s very possible but the challenge is in whose code.  When a user utters the wake word, it is Amazon who decide which Alexa enabled device received the clearest command and makes that device the controlling device and the other devices mute.  My understanding is that Sonos just pass the command to Amazon and they then decide what to do and return a message to the Sonos device.  Since Alexa was first enabled in Sonos devices, there have been numerous tweaks to the sensitivity of the Wake word.  There is always a balance between ensuring that the device wakes up and reducing false triggers.

I’m not 100% sure but I believe that this tuning is carried out primarily by Amazon in their cloud service.  Hence me pointing out the changes that I’m experiencing with my Echo devices.  However without knowledge of the cloud architecture of the Sonos and Amazon messaging, I can only guess.

@UKMedia

Yes, thats the way it usually should work. But in this case imho there’s a problem at the very first step when the microphones are activated. Sometimes they immediately shut down again. So maybe the reason for this bug is just on the Era100 firmware side. But not sure because it only happens for Alexa and not for SVC. Just Sonos knows how this works in detail. 
But definitely it’s not a matter of sensitivity and speach, because you can force this bug also by holding down the microphone touch button instead of saying the keyword. Normally you can use this as an alternative to activate the microphones for Alexa and then she will listen until you release your finger from the button. 
But using this way the LED also sometimes turns off immediately after you put your finger on the touch button. 

Again, I don’t have this device so can’t test but that’s not my understanding of the functionality of the Mic button.  The mic is either turned on or off by pressing the Mic button.  The functionality that you’ve mentioned is only when the Mic is turned Off, please see: https://support.sonos.com/en-gb/article/using-touch-controls-on-sonos-products

Unless, I’ve misunderstood your post.

No i have no other echo device at home

@UKMedia 

I just wanted to straighten out, that the problem doesn‘t depend on mic sensitivity and way of speaking. And that could be proofed by using the touch functionality. 
So users don’t have to waste time testing this. 😉
The Sonos support document btw isn’t worded exactly because you also can use the touch button for activation if mics are turned on. 
 

I have exactly the same issue, ERA 100 I had a case open with Sonos support, in the end today they said its a known issue and they were working to fix it, I had called about 3 or 4 times and there was no mention of this so I hope that is true. I think I will post of social media and tag Sonos. 

Maybe if you haven't log a case and say I know it's a known issue, there more report it the quicker it will be fixed.