Scrollbar and tab list fail to update correctly

[ChilledMoth]

Steps to reproduce

1. Install Firefox
2. Install Sidebery
3. Open a number of tabs large enough to cause the tab list to overflow and the scrollbar to appear
4. Create a nested group of tabs in the middle that contains at least one other nested group with at least 4 tabs that is already collapsed
5. Move the scrollbar away from the top position
6. Collapse the parent nested group

Actual behavior

The scrollbar and tab list fail to update correctly and no longer reflect the actual position and size (off by the combined height of tabs in the collapsed sub group?).

Repeatedly expanding/collapsing the parent group compounds the issue.

Only by scrolling the list view with the mouse wheel or moving the mouse pointer outside of it a proper update gets triggered.

Expected behavior

Scrollbar and tab list to update correctly on collapsing the parent group.

System

Windows 7 latest, Windows 10 latest

Firefox version

Firefox 115.11.0esr, Waterfox G6.0.15, Firefox 126.0.1

Sidebery version

5.2.0, 5.2.0.8

Logs

No response