Export Rush vs. Premiere

I have a technical question about the export settings in Rush or Premiere. The question is as follows:
We use falcon.io for our social media postings. For the export settings we use the preset "Facebook 2160p 4K Ultra-HD".
When I use it to export a sequence in Rush, it uploads perfectly.
When I use it to export a sequence in Premiere, the upload does not work.
The same applies to uploading to LinkedIn, Facebook, Instagram.

The settings and presets are absolutely identical:

Is there a possible explanation for this?