Despite being visually identical to the same action in the Planner mode, it is necessary to fully stop Building and switch to Planning to use ghost override / robots--even if one wishes to then switch back to Builder mode immediately after.
There is no visible difference between Builder mode and Planner mode, but only the Planner behaves as expected.
![Arrow :arrow:](./images/smilies/icon_arrow.gif)
Note: This is technically the behavior since 0.13, but the new ghost icon while holding shift lends further weight to the argument about user expectations. Currently, the ghost lies.
![Razz :P](./images/smilies/icon_razz.gif)