When using a laptop with a certain scale connected to two external monitors of a different scale in a configuration like this (two external monitors side-by-side with the laptop display below them situated halfway between):

display2 | display3

        display1

*and* the scale of the laptop display is a different scale than the external displays, context menus on display2/display3 can show up in the wrong position. Whether the issue reproduces on display2 or display3 seems to depend on which display *logically* comes first when Windows enumerates displays.

My repro:

MacBook Pro Intel

Display 1: Internal Retina display @ 250% scaling

Display 2 and 3: 4k monitors of the same model @150% scaling
# Lay out the monitors with the external monitors side-by-side and the laptop display underneath them halfway
# Open Unity and try both of the following (only one will repro):
## Put Unity in monitor 2 with hierarchy in the *right pane* and right-click on the hierarchy view close the the *right edge* of the display
## Put Unity in monitor 3 with hierarchy in the *left pane* and right-click on the hierarchy view close to the *left edge* of the display

Result: In one of the two scenarios, the context menu pops on the wrong monitor

Expected: Should pop up wherever the mouse pointer is