Feedback UI: Entity->Systems window displayed hierarchy broken

In Unity 2022.2.14 the Unity editor window for displaying the Systems is broken. The children system of all system groups are NOT indented so they cannot be distinguished from systems that are not belonging to the group:

"After Physics System Group" is collapsed:


"After Physics System Group" is expanded, but the systems which are belonging to the group cannot be directly seen here, because no indentation is used:

 

So it looks like the UI toolkit elements are being constructed correctly but the problem is that the selector .unity-tree-view__item-indent no longer defines a width.
I was able to fix this by editing the entities package and adding the following to dots-editor-common.uss

Code (uss):

1. .unity-tree-view__item-indent
2. {
3.     width:12px;
4. }

I haven't been able to figure out how to fix it without editing the package, adding the snippet to Assets\Editor\StyleSheets\Extensions\common.uss didn't change anything even though I can make changes to other parts of the editor in this way.

 

Thanks for sharing a solution. Still hope this will be fixed directly in the entities package with the next release.

 

Bumping as this is still occurring in 1.0.8 using the 2022.2.19 editor.
I've created a bug report for this issue, IN-41037