Sprite disappears when generating bones on gameObject

Steps to Repro:
1. Open attached project
2. Open 'Sample Scene'
3. Select 'atlas_0' game object
4. Generate bones GOs property in Sprite Skin component

Actual Result:
Observe that the sprite disappears

Occurring with:
2018.1.0b10, 2018.1.0b5

Note:
unable to check with older unity versions as packman UI is not available

Occurring on:
Windows 10 and Mac OSX 10.13