With uploading photos with the uploadwizard I always use Cc-zero as "license". I have uploaded multiple series of photos I recently made, and a part have a different license (cc-by-sa-4.0) and another part has (the correct) cc-zero. I am 100% sure that the uploadwizard showed cc-zero to me with uploading, but some photos automatic got cc-by-sa-4.0.
This bug is occurring for multiple weeks now.