1. Launch VRChat on Desktop.
  2. Add the Multiple Companion Cube Prop to the Action Menu.
  3. Repeatedly spawn and put away the new prop rapidly.
  4. Notice you can no longer spawn any props.
An error log states when the issue occurs:
[VRCItems] Tried spawning a prop but user did not have enough free Dynamic view IDs
And subsequent attempts show this error:
[VRCItems] Failed to get a valid networkId for prop.