Unable to select foliage by left clicking after 1.5 k foliage meshes placed

When using the foliage tool, once the mesh count reaches around 1.5k and higher you will be unable to select individual meshes by using the mouse. The lasso tool and the select all tool work as intended, the mouse is the only one being affected. If the mesh count drops below 1.5k you will be able to individually select meshes again. This issue is a regression. This issue is similar to [Link Removed]

Versions Tested:
4.16.3 - CL: 3561208 - Issue does not occur
4.17.1 - CL: 3586342 - Issue occurs
4.18 - CL: 3597901 - Issue occurs

1. Create a new project (No template or starter content needed)
2. Create a new landscape
3. In the foliage tool add a new static mesh to the brush (You can find some in the Engine content)
4. Place foliage until you have around 1.7 - 2k meshes placed (in the foliage tools the mesh you added will display the amount of meshes you have placed)
5. In the foliage tools click the select button
6. Select an individual mesh
   Result: You will be unable to select an individual mesh
   Expected result: The individual mesh is selected

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