Minecraft: 1.20.1
NeoForge: 47.1.106
Quark: 4.0-460

There's an angle at which the wrong item is selected when the cursor is over the right-most item in the selector wheel.

Instead of selecting the beam (right item), the stripped wood (bottom right item) is selected.
The marked area is the one in which the selection error occurs.

Presumably this has something to do with an angle close to 0° / 360° not being handled correctly.