Hang after start to profile Android phone

I have try to profile  app on Nexus 5.

I could start profile with "Attach to Process" and "Launch Android Package" with basic hotspot.

The Launch Android Package could open app, 

But after I press stop, it would have no response.

(cmd continue to be black in whole progress)

And when I try to change project, 

The window of

"Please wait until the collection is cancelled" would appear and stay there (like forever, unless I remove my phone)

(2) Attatch to progress

Similar result, could start,   but no response after I press stop in GUI. and black cmd window in all progress

Thanks