Can only set the color once?

[glucas]

The first time I call background-set-color in a buffer it behaves as expected. If I call it again to change the color, the function works (and I can see the new value in the variable) but the color doesn't change again.

I'm on GNU Emacs 30.2 (build 2, aarch64-apple-darwin24.6.0, NS appkit-2575.70 Version 15.7.3 (Build 24G419)) of 2026-01-27.

[glucas]

Hm, if I call buffer-background-toggle it seems to toggle off and then immediately back on (and at that point the new color is applied.) Not sure if my expectation is wrong, or if I have something interfering in some way.