Field file upload gets no name in the dom structure

I have recently had the problem that the field of type file does not get a name assigned. This leads to problems when the browser sends the form.

Any ideas?

Start by reproducing the issue with a form field of type file and inspect the generated DOM to confirm whether the name attribute is missing. Trace the form field rendering path in the repository, then verify that the browser submits the uploaded file under the expected field name.

Written by the indexing model from the issue text.