Hi have a multi-monitor configuration (two portrait on left, then two landscape stacked to right of that). The top of the stack is rotated over and windows is managing this as "Landscape (flipped)". I have multi-monitor taskbar on, normally located at the top edge.

If I set a function to maximise on the top screen (I do have a virtual vertical split also, but I don't think this is the issue) with the taskbar visible (autohide disabled), the window snaps as if the taskbar was on the bottom edge. Likewise, if I put the taskbar on the bottom, it snaps as if it was on the top. I wonder if the logic to offset is using the position *physically* on the screen rather than the logical top and bottom due to being in flipped orientation.

This only happens on the flipped monitor in landscape mode. It works fine on one which i have portrait (flipped).

Setup:
Windows 10
4 monitors - each split (roughly) in half
[2][1][3 3]
[2][1][4 4]
Taskbars attached to top and bottom edges only.

Hi Keith, we have very restrictive rules here and I would need to get the entire file vetted to send which they are both slow on and often just say no...

However, if you let me know any specific details I can provide them where they are clearly just configuraiton - my apologies. The monitors affected are:
wihtout splits:
#3: X=0, Y=-1080, W=1920, H=1080; Work area: X=0, Y=-1080
With splits (just one, the second is the same just offset horizontally):
#3.1: X=0, Y=-1080, W=960, H=1080, Y=-1050, W=960, H=-1050, L=0,R=0,T=0,B=0
EIZO EV2450, NVIDIA NVS 510, DisplayPOrtEXternal
Orientation: LandscapeFlipped

The funciton used was:
MonM-U: alt;ctrl;win;104, , Jump List: False, Description: Move window to monitor #301, Move window to top-left corner of monitor, Change window width to specified percentage: 200%, Change window height to specified percentage: 100%

Taskbar 3.1:
Bounds Current X=0, Y=-1080, W=960, H=30

Version 9.5.0.0
The same effect happens if I place a window where I want it and use the target icon to load the function.