Issue Summary

Sometimes when an attachment is added to a card via the API, the link to the file storage is empty, even though the attachment appears in the activity log, and contributes to the attached files badge on the card front.

Steps to Reproduce

1. Unknown, though it has only ever happened when adding a file attachment through the API, for example, via Zapier.

Expected Results

All files attached to a card can be viewed and downloaded. If the file storage URL is empty, we would expect to see an error or some other handling of the file, rather than it appearing to attach correctly.

Actual Results

Th link to the file storage is empty, even though the attachment appears in the activity log, and contributes to the attached files badge on the card front.

Workaround

Reupload the file manually, or reattempt the API upload.