Xcode console area could not fully expand

Number:rdar://FB8815949 Date Originated:2020/10/21
Status:Open Resolved:NO
Product:Xcode Product Version:12.0 (12A7209)
Classification:Incorrect/Unexpected Behavior Reproducible:YES
Starting from Xcode 12, the console area could not fully expand

1. Use Xcode >= 12.0

2. Open any project

3. Command + Shift + C to activate console

4. Move mouse to console area and expand the console size by pulling up

5. The maximum size of console area will be about 2/3 of screen, can't get bigger

What did you expect to happen?

- Console area should be able to fully expand as same as the screen size, it works on Xcode 11 and below
What actually happened?
- The console area only expands to 2/3 of screen, causing hard to read output messages 

Demo video: https://i.imgur.com/baVLReH.mp4


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