Plugin Windows Arrangement

After opening plugins and arranging them around multiple displays, meters on one, processing on another etc.
When you switch to program outside of Wavelab, e.g Finder (Mac OS) and then back to WL, the plugins appear back on top of the main Wavelab window and not the displays there were on.

Wondered if anyone has a solution to this, I have trawled through all the plugin handling options with no success.