Drag and drop assets, then delete, won't allow reimport

Summary

If you drag multiple images into Cavalry from the finder, then delete the folder (and assets) created, Cavalry will not allow reimport of those files again. I think Cavalry is still believing they exist in the Assets window because the notification at the bottom reads "Updated Asset:"

Steps to reproduce

(How one can reproduce the issue - this is very important.)

1. Drag and drop assets from finder to Cavalry
2. Delete the group created (and assets within).
3. Drag and drop same assets into Cavalry

Examples

Screenrecording: DeletedAssets-1080p

What is the current issue's behavior?

Files don't reimport, they "update" even though they aren't visible in Asset window

What is the expected correct behavior?

Reimport the asset