Switch/Show of mesh as child of Canvas does not work

[vorth]

https://codesandbox.io/p/sandbox/solid-three-with-switch-forked-d1jmmf?file=%2Fsrc%2FApp.jsx%3A41%2C7

Change the fragment (lines 18 & 41) to a <group>...</group>, and it will start working. The Switch doesn't work unless the parent is a valid Object3D, or something of that nature.

I have seen the same issue with <Show>.