Shooting tethered with 2nd monitors, live view wont stay put on 2nd monitor screen.

Is this a MacOS issue? I prefer to use PC with Capture One but thats not an option here.

So I have a Canon R5 tethered USBC to a Macbook running Lightroom Classic,

Main display is my Macbook screen running LRC,

Second Display is on a production cart with 2nd ,monitor angled to subject on live view, display turned verticle.

I drag over the Live view to the 2nd display and size it to the screen, 

I take the shot, live view shows the last capture, 

I press live view again, live view window moves to my main main screen.

I rage

So simple question how to lock live view to 2nd display?