FaceTime (audio only call) bug on Mac OS 10.13.2

Hi,

It would seem there is a bug when making a FaceTime (audio only call). When the call is established, not only can you not move the FaceTime window (in audio only calls) but you can't even use the buttons ... so you can't hangup the call for example ... the window seems frozen. The only way to hangup the call is to kill FaceTime (force quit).

I have this issue using High Sierra 10.13.2 on Mac Mini Late 2014.

Some of you have the same problem ? Thank you in advance for reading me guys.

Note: FaceTime (video calls) work fine ... the problem occurs only when making Audio Only Calls.