Not sure if anyone else has come across this or not.
My virtual switches in smartthings have stopped working with all my Echo devices. I have virtual Momentary Switches that are working fine, only devices with the type “Simulated Switch” are not functional. I have deleted and readded them several times. Echo detects them and adds them to the app, but the app shows them as not responding.
Everything else (even other virtual device types) connected through Smartthings appears to be working.