After using Rotate Object, most of my object vanished
Starting with a cut out of a fence post:

I used the Rotate Object feature to rotate it around the Y axis so that it faced the correct way and was tilted correctly.
The first time I applied the transform by clicking Done, it look ok, but I then used the Edit rotation option to make some minor adjustments, and after it finished rendering, I was left with just the sign from the post:

