Help and cogwheel icons are missing in Animation State Transition component

Steps to Repro:

1. Create a new Project
2. Hierarchy > right-click > 3D > Cube
3. Select Cube > Window > Animation > Animation > new Animation
4. Select Cube > Window > Animation > Animator > Layer > "+" icon
5. Drag and drop NewAnimation in the Base Layer and make transition
6. click on on the transition arrow > Inspector

Actual Result: Help and cogwheel icons are missing in Animation State Transition component
Expected Result: Help and cogwheel icons should be presented

Reproducible on: 2019.3.0a3

Working Fine on: 2019.3.0a2, 2019.2.0b2

Environment:
Windows Only