This new test consistently fails on my Windows 10 for two reasons:
(1) apparently convertPointToScreen() converts a wrong point (it is always white and not red as expected;
(2) and even that white isn't white enough after delay of 200ms. It is something random close to 255,255,255: some 233,235,238 etc. A full second delay helps here.

The icon looks correct so it is a test bug, I think.