How to reproduce:
1. Create and open a new project
2. In the toolbar, navigate to Window > Analysis > Profiler
3. In the Profiler window, change the target to “Edit Mode”
4. Wait for ~5 sec for the Profiler to record some data
5. Disable recording
6. In the module details panel, change the timing data view to “Timeline”
7. Expand the “Job” thread
8. Resize a few of the “Worker #” threads to the smallest size
9. Scroll up and down, in the module details panel
10. Observe the separation lines between threads

Expected result: The separation lines are always shown
Actual result: The separation lines appear and disappear while scrolling

Reproducible with: 2022.1.0a1, 2022.3.62f1, 6000.0.50f1, 6000.1.5f1, 6000.2.0b4

Reproducible on: macOS 15.3 (M2 Ultra)
Not reproducible on: Windows 11