Using Brush to Raise or Lower Terrain while baking lights Editor crashes

Steps to Repro:
1. Create a new Project
2. Create a new Terrain Object
3. Select Brush and Select Raise or Lower Terrain
4. Use Raise and Lower Brush on Terrain while baking lights

Actual Result: Editor Crashes

Expected Result: Terrain raises

Note: This is not occurring every time(6/10)

Reproduce on:
2019.3.0a2, 2019.2.0a14

Working Fine on:
2019.3.0a1, 2019.2.0a13

Environment:
Windows 10 only