JabRef version

Latest development branch build (please note build date below)

Operating system

Windows

Details on version and operating system

No response

Checked with the latest development build (copy version output from About dialog)

• I made a backup of my libraries before testing the latest development version.
• I have tested the latest development version and the problem persists

Steps to reproduce the behaviour

1. Create a new library
2. Have 10 PDFs
3. Drag'n'drop them into JabRef to be added
4. See that each BibEntry has all files attached

See #12072 (comment) for screenshots etc.

Appendix

No response