Elevations must be perfectly perpendicular to a wall
(as shown in the first image below) otherwise there are issues with being able
to dimension, and/or their values. Also, in this case, the 3D object appears
rather than the (sometimes) simplified symbolic lines developed in the
family.
Keeping reading to learn more...
I also recommend the view depth of an elevation is adjusted to the center of the wall (see image above) so elements are not selected behind the wall when using a selection window.
Here is an exaggerated example of an elevation not aligning with a wall. Usually, when this problem arises, it is not visually obvious that is the problem. Try creating a new elevation adjacent to the current elevation to test.
TIP: If something becomes un-hosted, select it and
use the Pick New (host) option on the Ribbon.
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