OOTPX doesn't play nice with my taskbar

[dcd111]

Windows XP with sp3, OOTPX 10.2.16

I have OOTPX set to be windowed, at the same size as my desktop. My taskbar is set to be always on top. When I open OOTPX, it seems to be cooperating with my taskbar, the OOTP screen adjusts to allow my taskbar to fit below it, even though by the size I've chosen the taskbar should hide some portion of the OOTP screen.

However, while using the program, eventually the taskbar will appear to be frozen. I realized this is only an illusion, if I move the OOTP window it becomes clear that the OOTP window has become the full size of the screen, but is now showing a snapshot of the taskbar at the bottom. And this window is sitting in front of my "always on top" taskbar that is working fine, but was obscured by OOTP instead of the other way around.

Minimizing and restoring fixes the problem, but only temporarily. Sooner or later, it happens again.

I tried to work around this by making my taskbar auto-hide, but when I have OOTP open the taskbar won't appear when my mouse moves to the bottom of the screen, so I have to minimize OOTP to bring up the taskbar.