Home / WindowPos not remembered in portable version?

Using portable Sumatra v312 x64 on Windows 10 with 3 monitors:
[ 3 ] <-- wide external monitor
[ 2 ] <-- wide external monitor
[1] <-- laptop screen is where I try to read my PDF’s.

After resizing the window, the desired window position is stored to SumatraPDF-settings.txt
WindowPos = -284 1080 1474 762

But, Sumatra always opens the same file in a smaller width window?
WindowPos = -284 1080 588 762

That is indeed strange. Unfortunately, I don’t have multi-monitor setup to test.

Yes, this continues to be frustrating.
For now, I open the Window maximized and Sumatra remembers that.