Organization Asset Libraries not filtering in PowerPoint Brand Images

Hi,

I have set up three Organization Asset Libraries on the same SharePoint site using the `Set-SPOOrgAssetsLibrary` PowerShell cmdlet. All three are image libraries, each intended for a different language version of our company assets.

When I go to PowerPoint → Insert → Pictures → Brand Images, I can see a dropdown that allows me to switch between the libraries. However, regardless of which library I select, all images from all three libraries are displayed at the same time.

My questions:

1. Is this expected behavior (by design), or is it a bug?

2. If by design — what is the actual purpose of the library switcher dropdown if it doesn't filter the content?

Any insight or official documentation reference would be greatly appreciated.

Thanks!