Palettes not staying in position on MacOS

[Haneef Tayob]

We work on with dual screen and like to keep some palettes on the second screen.
Ever since we upgrade our MacOS to macOS Sierra, we can't seem to get the palettes to remain in the desired position. I'll place the palette in screen 2. Shortly after continuing drawing, the palette jumps back to screen 1.

It was from AC20 and the same is noticed with AC21.

Any suggestion would be appreciated.

[Haneef Tayob]

I think I may have found the solution.
Under 'Work Environment/Dialog Boxes and palettes/ thens a tick box to keep "Archicad palettes visible even when another application is in front".