Landscape Sculpt Brush Gets Hidden Unexpectedly

While sculpting (holding left mouse button) if you press the right mouse button the brush will disappear. The brush will remain hidden while sculpting until the right mouse button is pressed once again while not sculpting.

1. Open blank project
2. Create Landscape
3. Hold LMB to sculpt landscape
4. Press and release RMB while holding LMB

RESULT
The brush will become invisible

EXPECTED
The brush is still visible

REGRESSION?
No

Right-clicking during landscape sculpt hides brush while LMB is down until RMB is pressed again