I just thought I’d post this in case it tripped up someone else
I already have an echo with a large amount of lights hooked up to it. I decided to buy an echo for my dad who has 5 lights total, and then set it up so that he could trigger them thru alexa with the smartthings integration. He has his own amazon account + smartthings account.
I went home and then noticed that none of my commands were working, and that only 5 lights were showing up in discovery after I deleted everything on Echo. This should have been the part where I realized what happened, but a few more hours would pass before that hit me.
After a few hours of troubleshooting I remembered that I granted myself access to his hub as a different location on my account. Apparently, if you have 2 locations Alexa can only control one of them, and as far as I can tell there’s no way to choose which location.
I ended up fixing it by removing myself from my dad’s hub and then Alexa picked up everything again without any issues.