As of few days ago, my scenes stopped working. Nothing has changed in set up and they were working all along. Now, when I say "turn off <scene name>", it says something like "I don't know this device". If I go to Alexa app, I see the scenes (with proper names), but there's no option to turn it off or on. Only "All Off / All On" on top of scene list. 

Not sure if it's the same issue but my alexa started acting up a few days ago also with no programming changes or devices additions/deletions. There are now some devices on the isy portal that do not show up in my alexa that did (and rediscover doesn't work). On top of that, alexa has some devices listed as offline although they are online and remain accessible through the isy portal. I noticed in those cases the alexa as them listed as "other" type instead of light for some reason now.  I checked the portal and it seems to be functioning. I also disabled and re enabled the skill and rediscovered devices without luck.  I wonder if something broke with the skill.

43 minutes ago, NHWA said:

Not sure if it's the same issue but my alexa started acting up a few days ago also with no programming changes or devices additions/deletions. There are now some devices on the isy portal that do not show up in my alexa that did (and rediscover doesn't work). On top of that, alexa has some devices listed as offline although they are online and remain accessible through the isy portal. I noticed in those cases the alexa as them listed as "other" type instead of light for some reason now.  I checked the portal and it seems to be functioning. I also disabled and re enabled the skill and rediscovered devices without luck.  I wonder if something broke with the skill.

try logging in via a regular computer browser at https://alexa.amazon.com then delete all devices and scenes that are ISY related.  then say "Alexa, discover devices".  I find it's about 3 times faster and easier to see the list if you use a full browser over the app.

Just as it's stopped working, today I've tried and it started working again. Not changes done whatsoever. ? that it happened but ? that it works now.