sideBarSectionHeader.border does not appear immediately in VS Code

[robertrossmann]

Version: 1.45.0-insider
Commit: 6e9a34c0de4181a99f11e106733ee3e8c9db79f1
Date: 2020-04-16T05:41:45.257Z
Electron: 7.2.1
Chrome: 78.0.3904.130
Node.js: 12.8.1
V8: 7.8.279.23-electron.0
OS: Darwin x64 19.4.0

The sidebar section border (sideBarSectionHeader.border) between a Terminal panel and Problems panel is not shown until the bottom (Problems) panel is collapsed and expanded again. See the attached gif for exact demo.

I have not tested this with other panel configurations.

Steps to Reproduce:

1. Move the Problems panel below Terminal panel in a vertical alignment
2. Set a colour for sideBarSectionHeader.border
3. Reload VS Code
4. Observe Problems panel does not have any border
5. Collapse Problems panel (click the panel title)
6. Expand Problems panel
7. Observe Problems panel now does have the border

Notice the black border on top which appears after I expand the Problems panel. It is somewhat difficult to see in an inline view, maybe open the gif in a separate tab or zoom it in.

Does this issue occur when all extensions are disabled?: Yes/No

[vscodebot]

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• workbench.action.focusPanel does not change focus when Problems panel was last selected (#92237)