Slow deleting terrain occluders

[Ecks]

I observed that it is quite slow to delete parts of terrain occluders. For example, deleting the single occluder from the terrain polygon in the attached screenshot takes 4-6 seconds: Capture.JPG. Deleting an entire terrain polygon is quick, it is when deleting a subset of points that it is slow. I've observed this on two different systems.

This is in a new 5E campaign with no extensions. To re-create:

1. Load module Tomb of Annihilation
2. Open map titled "Player Map - Rotten Halls"
3. Delete parts of a terrain occluder, for example the point in screenshot

FG v4.1.6
5E v2021-07-06
Windows 10
Ryzen 7 3800X, NVIDIA RTX 2080 Super