No file extension when using VaporFile

Hey all,

Currently using VaporFile in Nova as to save directly to S3 and support larger files. However, it doesn't seem to be saving a file extension of whatever is uploaded. Wondered if anyone's able to shed any light on the issue? Thanks.

VaporFile::make('Attachment', 'attachment')
    ->path('/announcements')
    ->acceptedTypes('.mp4,.mov,.png,.jpg'),