So I have your typical complex setup at home. I have Alexa in several rooms (both full devices and Dots) as well as Samsung Smartthings, Lutron switches (with their own hub as well) and about 80 different varied smart devices in total.
In my main bedroom I had a Dot named "Master Bedroom" and when the Echo Input came out I decided to replace the Dot with this as the Dot is plugged into high-end powered speakers there so its own speaker was useless. The new Input came and I named it "Master Bedroom", renamed the Dot to "Old Master Bedroom", matched all settings and fired it up. All seemed fine.
Then my wife came into the room later and said, "Alexa, turn off the bedroom light". That worked 100% of the time under the Dot, but with the Input it didn't. Instead we heard something like, "Bedroom doesn't support that." Huh? So I look in my devices and see that Smartthings calls the lights there "Bedroom" but it's really "Bedroom Lutron" controlled by the Lutron hub. Smartthings hub is actually faster and working with it than Lutron so this used to be a win/win.
I tried changing the setting in Alexa app for the Bedroom device from "Switch" to "Light" and it still wouldn't work. I changed the device name in Alexa of "Bedroom" to "Bedroom 1" (and reset the device back to its default of Type "Switch" and then it worked. "Alexa, turn off Bedroom 1 light". Bing.... Done.
I don't get it. Why did the changing of the Dot to the Input cause this issue and why won't it work with the device named Bedroom??? It's the ONLY device in the system specifically named that, though there are Bedroom 2 and Bedroom 3 devices.
I also have a similar issue in my family room. I have a light there called "Family Room Lights". I mistakenly called it this when I set it up because it is 3 recessed lights. My wife continually says, "Alexa, turn off Family Room LIGHT" and it fails to do it. "I can't find any device named Family Room Light." So I changed the Alexa device name to "Family Room Light" and, surprise, now when she says, "Alexa, turn off the Family Room Light" we get "Family Room Light doesn't support that." WHAT THE HECK!?!
Any ideas?