Tooltips are missing for all properties under the following component:
Audio Reverb Zone
Audio Chorus Filter
Audio Echo Filter
Audio Low Pass Filter
Audio High Pass Filter
Audio Distortion Filter

Steps to repro:
1. Create a new project
2. Hierarchy > Create > Audio > Audio Source
3. Inspector > Add Component > Audio > Audio Chorus Filter
4. Hover mouse properties under Filter

Actual Result:
Tooltips are missing

Expected Result:
Tooltip appears when mouse is hovered on the properties

Occurring on:
2020.2.0a16, 2020.1.0b14, 2019.3.15f1, 2019.2.13f1, 2019.1.11f1, 2018.4.24f1

Environment:
Windows10 and macOS 10.14