When I "first" open Amibroker and then open a floating Layouts window, the list is blank (or sometimes a partial list is slowly displayed). Then when I close and re-open the Layouts window, all the layout list is displayed fine after that.
This is not happening when the Layout list is docked, but only when it is floating.
I tried this on both my desktop (hd) and laptop (4k), and occurs on both. Definitely a refresh problem.
Apparently it occurs only when you just open floating pane that was originally closed and there is an extra invalidate needed because Windows tree is 'lazy" to repaint items, if you just hover/move the mouse above the list - all items will appear. Will add extra invalidate in next ver.