Unscheduled Tasks right-sidebar in calendar s completely blank/empty (Hub 26 / v33.0.3)

[Apollosport]

Steps to reproduce

1.Ensure the Tasks app is enabled and populated with tasks that do not have a due date.

2. Open the Calendar app.

3. Ensure the specific Task list is checked/toggled on in the left-hand navigation.

4. Click the icon to open the "Unscheduled tasks" right sidebar.

5. The sidebar opens but is completely empty.

Expected behavior

The right sidebar should populate with a list of unscheduled tasks corresponding to the active/toggled lists in the left navigation panel.

Actual behaviour

The sidebar opens but remains blank.

Troubleshooting already performed:

Confirmed the tasks exist and are visible in the dedicated Tasks app.

Confirmed scheduled tasks do appear normally on the main calendar grid.

Ran occ dav:fix-missing-caldav-changes to ensure no database sync issues.

Checked browser DevTools (F12) -> Console: No errors are thrown when opening the sidebar.

Unregistered Service Workers (preview-service-worker.js) and performed a hard cache clear (Ctrl+F5) to rule out stale frontend code.

Tasks app version

No response

CalDAV-clients used

No response

Browser

Firefox 150.0.3

Client operating system

Windows, MacOS

Server operating system

Debian

Web server

Apache

Database engine version

None

PHP engine version

None

Nextcloud version

33.0.3

Updated from an older installed version or fresh install

None

List of activated apps

Nextcloud configuration

Web server error log

Log file

Browser log

Additional info

No response