Minecraft: 1.16.2
Fabric API: 0.20.1+build.401
Sandwichable: 1.1.2

After placing a cheese slice into a basin you can get back a whole wheel of cheese.

This... is confounding??? I have no idea how I would make that kind of mistake but thanks for letting me know!

I looked at the code... This has been a bug since 1.0.2 and you have just found it!

It was easy to overlook. Who would right click a slice on the basin anyway, other than by accident? (Which is what I did.)