I have a user that attaching 12 files and when they submit the request, its showing 0 files attached.
Release : 17.1 or prior
Component : SERVICE CATALOG
The multiple attachments only happens before clicking Submit request in Service Catalog. For existing/created request does not have multiple attachment in one shot.
Before Service Catalog 17.2 ru3, no attachment size validation in multiple attachment perform whether it would exceed the max size of the attachment. Out of box size is 5MB. Therefore, Administrator may follow below article to increase the max size of attachment.
Article 36909 Attach multiple files to a catalog request
However, it still have chance to exceed the increased attachment max total size in the multiple attachment list before Submit the request. It led to empty/loss the attachment in submitted request in Service Catalog like this particular reported case.