Okay, I ran into this issue...
When a Structural Column is located in a plan view, but the top of the column is way down this level, so it should not appear there, but it is!
However, when you look to the Element Properties of that Structural Column you will see that within the Analytical Model group the parameter "Top Vertical Projection" is set to "Top of Column". I do not know why it is set this way, but it appears to be this way sometimes...
Change this parameter to "Auto-detect". Click on OK and now your plan view looks right again.
