Plane cut in modeling mode not working correctly

Summary

In 5.8 When I was using plane cut in model mode to cut a tree to make a stump which I can confirm it makes the stump however I also toggled the option to keep both halves so I could have a tree in the fallen state also. In the midst of doing that the tree stump is left but when I drag off the fallen tree the stump and the fallen tree is still intact. Even when I drag the fallen tree which is the static mesh that doesn’t supposed to have the stump… the stump is still there just sunken into the ground to make it look like the stump isn’t there . But in 5.5 the plane cut works as expected

What Type of Bug are you experiencing?

Level Design & Art Tools

Steps to Reproduce

Drag in a tree mesh. Switch to modeling and select the plane cut mode set the z to 75 select keep both halves and cut

Expected Result

The expected result was to split the mesh and half and have two different meshes

Observed Result

After cutting the mesh …it’s leaves a stump as intended however when you remove the geometry collection the stump is still connected to model it was cut from

Affects Versions

5.8

Platform(s)

Windows