We’ve done some testing on our end and have not been able to replicate what you’re seeing. When we submit large files to our form backend, we are seeing the submissions in our database, including link to file.
We also looked at our logs for the submission you messaged about: firstname.lastname@example.org on June 4. That POST request did not contain any file data, so it seems like your end user did not attach a file to that submission. We did notice that the document field of your form is not
required, so it’s possible that users are able to submit forms without the documents that you’d like.
We’d suggest making that field
required. Please let us know if you continue to run into the issue after that!