Bug#1028637: Spyder stops showing indent guides after restart

[local10]

Package: spyder                          
Version: 5.4.1+ds-1

Spyder stops showing indent guides after restart. To reproduce the issue:

1. Start with a clean Spyder profile, that is, remove the "/home/luser/.config/spyder-py3" dir, if  it exists
2. Start Spyder
3. Open the following file "/usr/lib/python3.10/subprocess.py"
4. Goto Menu > Source and enable the following:
    [x] Show indent guides
    [x] Show selector for classes and functions
    [x] Underline errors and warnings
5. Indent guides should be properly shown
6. Shut down Spyder
7. Start Spyer, go to tab with /usr/lib/python3.10/subprocess.py, indent guides are not shown.

Thanks