I am still having issues. Without changing anything, I tried starting a playlist and skipping a song and got the same response from Alexa saying she cannot skip. Then I removed the Sonos skill from the Alexa app, deleted my speakers and re-enabled the app. The process is now asking me to “pick a system I want to control” It looks like it has separated all my speakers into 2 different systems. See screen shot below. After choosing one of the systems, Alexa will ONLY find the devices in that systems and not the others.

@ando1, Do you have any sort of wireless range extenders in use? Submit a diagnostic and reply here with the confirmation number it gives at the end.

@Smilja I do not have any kind of range extenders. Network is a full stack of Ubiquiti Unifi with USG Pro 4 and 2 UniFi switches. I submitted a diagnostic, the number is 1367450227. I suspect this is not going to show all of the Sonos devices that I have because I only see the ones I selected during the process of re-installing the skill in the Alexa app.

Thanks Ryan! All started working again for me yesterday!!

Just to follow up in case anyone else is still having issues. I totally reset all my Sonos speakers and added them to a new systems. Once I did this and then re-added them to the Alexa app, skipping is working again.

Thanks Ryan! Now all works perfectly!