How to reproduce:
1. Create a new project
2. Open the Package Manager
3. Open the UIElements Debugger (press CTRL-F5)
4. Press Pick Element button in the UIElements Debugger
5. Pick any text element in the Package Manager
6. Change the padding-left or padding-right value in the UIElements Debugger

Expected results: the padding changes around the picked text instantly
Actual results: the padding does not change around the picked text

Reproducible with: 2019.2.0a6, 2019.2.21f1, 2019.3.5f1, 2020.1.0b1, 2020.2.0a2
Not reproducible with: 2018.4.0f1, 2019.2.0a5

Could not test with: 2017.4.38f1 because UIElements module is not available

Notes:
1. The padding changes around the picked text when resizing or hovering over the Package Manager
2. Most usually it is reproducible with smaller padding values (you can see that in the attached video)