As before, one monitor is high DPI and the other isn't.
HighDPI monitor is positioned below the low dpi monitor, low dpi (external) monitor is primary.
Slick on high dpi monitor.
#1
Edit tool bar docked to the top of slickedit.
I grab it and drag it up to the low dpi monitor.
The toolbar becomes invisible as I drag it onto the lowdpi monitor (at about the point you would expect the scaling to change).
This only happens when I drag a toolbar that is docked.
If I undock it first, this doesn't happen.
#2
Undock edit.
Drag it (slowly) to lowdpi monitor.
Again, drag edit around on lowdpi monitor - drag quickly and it disappears. I have to use view-> ToolBars to close edit and open it again to get it back - as doing that puts it back docked on slick main window.
This happens with tool windows as well -- quickly dragging on the lowdpi monitor causes them to vanish. Slowly dragging usually works.