Sourcetree on Mac cannot detect current (dark/light) mode on login

I see this when I turn on my computer in the morning. I use "Auto" mode for appearance on MacOS and Sourcetree cannot detect current mode and keeps previous appearance. To solve this, I need to switch appearance manually from System Preferences on every login.

Steps to reproduce:

1. Change Appearance of Mac to "Auto"
2. Wait for Mac to switch automatically to "Dark" mode
3. Turn off computer
4. Turn on computer in the morning to make sure it switches to "Light" mode
5. Check Sourcetree
6. Soucetree keeps dark mode even though rest of the apps use light mode