Number of plant units on a slope is not correct

As I place plants on a terrain as a shrub or groundcover the result of the nubers of units are not correct.
If I measure the exact same surface on the slope by _area and devide by the units/m2 the result is not the same. If I measure the projected area it is the same.
What am I doing wrong?

Hi Erik, can you share some example we can test this with? please send them to

I sent you a wetransfer

Hi Erik,
Thanks for the file. I can see the number of plants in groundcovers is taking the “projected area” when they are projected in complex terrains. We will revise this.

thank you for this!