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Steps to reproduce

Create a folder structure like this:

Expected behaviour

When navigating to the top level folder, it should show 2 sub level folders

Actual behaviour

This happens on stable33 and master. Running bisect on master shows:

706db843295facc67d425093951058556317b622 is the first bad commit
commit 706db843295facc67d425093951058556317b622 (HEAD)
Author: provokateurin <[email protected]>
Date:   Wed Jan 14 13:35:49 2026 +0100

    feat(MountProvider): Implement IPartialMountProvider
    
    Signed-off-by: provokateurin <[email protected]>

 lib/Folder/FolderManager.php | 26 +++++++++++++++++++++-----
 lib/Mount/MountProvider.php  | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------
 2 files changed, 84 insertions(+), 23 deletions(-)

Downgrading to v21.0.2 also solves the issue on 33 (last version without partial mount provider.

@provokateurin