[Asset Store UI] The asset store panel appears blank after we minimize and restore it when its a modal window

2. How we can reproduce it using the example you attached
https://gyazo.com/4b36692b858b8567ecff9961ce6d6416

- Launch unity
- Open asset store window
- Do not dock it to any of the panels, thus making it a modal window
- Now minimize the window and restore

Note that the window becomes blank.

Workaround is to minimize and restore again!