Loader & version autodetect doesn't happen when uploading multiple initial files

[ThePotatoArchivist]

Please confirm the following.

• I checked the existing issues for duplicate problems
• I have tried resolving the issue using the support portal

What browsers are you seeing the problem on?

Firefox

Describe the bug

When I upload multiple fabric mod jars at once (e.g. main jar & sources) it does not automatically detect the loader & versions. It works normally if I only upload the main jar, then upload the sources jar afterwards.

Steps to reproduce

1. Create a project, or open an existing one
2. Create a version
3. Upload multiple mod files at once, e.g. a main jar and sources
4. You get sent through the loader & version selection instead of it automatically figuring it out from the jar
5. Repeat but only upload a single file and autodetect does happen

Expected behavior

It should autodetect the loader & version even if you upload multiple files at once

Additional context

I think this is a recent bug because it worked like normal yesterday