big sur – Big Sur menu bar changes color from black to white when switching virtual desktops – possible to pin it to a single color?

So my menu bar changes its color when I switch virtual desktops. On desktop 1, I have black text on a white menu bar. On Desktop 2, it is white text on white menu bar. On desktop 3 and beyond, it is white text on a dark menu bar:

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The menu bar on Desktop 2 is mostly unreadable. I think this is a bug, since changing the wallpaper temporarily solves the problem (all virtual desktops appear using a menu bar style consistent with virtual desktop 1) but the problem returns after a short time. I also tried switching “Allow wallpaper tinting in windows” off, however, this didn’t fix the problem. Is that a known bug? Does Apple have some sort of issue tracker?