Can't control HS-100 / HS-110 plugs from the Kasa app
As few months ago I noticed I could no longer operate my HS-100 (or HS-110) plugs from the Kasa app.
I tried removing the plug from the app and performing a factory reset on the device but the behaviour is unchanged.
In the app I can see the state of the plug (on /off) but I'm unable to change it in the app. If I physically press the button on the plug I can see that change of state in the app.
If I try to change the state of the plug in the app I get the wheel but after quite a while it stops and nothing has changed.
Today I tried using the app on another phone and again performed a factory reset. During the setup (which worked as described in the instructions) I was asked to update the firmware. After everthing had finished I was still left unable to control the plug via the app, but can still see the plug's state.
When checking the plug I noticed the firmware had still not updated.