Green frame appearing around apps after using phyical keyboard

[BorisZ]

When I point on my apps by BK50, there is a wierd green frame around my apps.
I checked that the talkback function is off.
I don't know how to fix this.

[Lord_viridis]

Mine does this too and always have.

It was always my understanding that it's how Google implemented HUMAN interface devices as USB mice do this on this and other devices.

[BorisZ]

OK, I knew.

But, how should I fix this? It's impossible?

This problem just appeared in resent, I didn't meet this before.