TeamViewer Host for android: full control or just mirroring?

Hello, This teamviewer host is potentially an awesome service... but in real life it just drives me crazy.

The description on the official website/play store says clearly: "The TeamViewer Host app allows you to remotely control unattended Android devices. A connection is therefore possible even when the device is not being actively used."

Here is my experience so far:

moto g3 unrooted: when I installed Host about 1 year ago I remember perfectly that the touch input was working. I've been connecting to that device every now and then, but a few months ago it started sending mirror image only, no idea why.

moto g4 play, rooted or unrooted: just mirroring, i thought with root it would work but nothing changes, the app doesn't ask for root permission.

huawei y560: that's the cherry on top: I am able to connect but I don't even see the screen.

Any suggestion?
Thanks