Ensure Condition Failed when sculpting terrain

When sculpting terrain, an Ensure Condition Failed occurred. The Editor froze for several seconds before regaining responsiveness.

This issue is rare as I have only been able to get it to occur once. It also appears to be related to [Link Removed].

1. Open UE4 Editor to any project
2. If a landscape is not already created, create one
3. Apply a material to the landscape
4. Sculpt on the terrain

RESULT:
Ensure condition failed, causing the Editor to freeze for several seconds before responding.

EXPECTED RESULT:
Landscape terrain will be sculpted seamlessly without freezes or hangups.