Unresponsive virtual switches in Alexa app

I wondered if anyone else was seeing this problem. After Smartthings app update (appeared to happen then) I lost the ability to control many items from smartthings via voice control through alexa. Unlinking the harmony account and reconnecting within the smartthings app fixed ir controls. However all virtual switches are marked as Device is unresponsive within the alexa app. I have tried removing and re adding them and toggling them within the smartthings app (they work fine there) but to no avail. Any suggestions?

Likely a duplicate of this Topic below:

Thank you, your help is much appreciated. Changing them to virtual switches solved the issue. :blush: