FluentUi React-file-type-icon changed

[ryanching]

I'm using FluentUI React-file-type-icon for xlsx icon per the documentation here.

<Icon {...getFileTypeIconProps({ extension: "xlsx", size: 16 })} />

When I originally added the icons to my repo ~1 month ago, they looked as expected:

However after some unknown change in my repo, the icon looks different:

The code snippet used to add the icon is still the same, so I'm unsure what has caused this change. Does anyone know what would cause the new icon to appear, and how I can revert it back to the old icon?

[ryanching]

Spoke with design team who confirmed this was caused by a change by FluentUI to update the icons. It does not seem possible to revert to the original icons.