-e 'Bake Selected' ignores Lock Atlas setting

1) Open the attached project and load the "lightmaps" scene
2) Select the sphere
3) Open the 'Lightmapping' panel
4) Expand the 'Atlas' section on the Object tab and observe that the sphere is assigned lightmap index 1
5) Turn on 'Lock Atlas' on the Bake tab
6) Click 'Bake Selected'
7) When baking has completed and Unity has finished reimporting the light maps, select the sphere and check the Atlas section of the Object tab

Expected result:
As Lock Atlas is turned on, the atlas settings for the object should not have changed; the object should still be on lightmap index 1.

Actual result:
The atlas settings have changed; the object is now on lightmap index 0.