Ok so:
- The logo is the one that appears in the footer.
- You followed the logo customisation tutorial
- You are using tutor behind a web proxy with a custom ssl certificate.
None of this was obvious in your question or your follow-up comment. Please be more specific next time?
The footer logo is behaving differently from the rest because edx-platform relies on a funky _footer_logo_img function: https://github.com/edx/edx-platform/blob/open-release/ironwood.master/lms/djangoapps/branding/api.py#L340
It’s difficult for me to reproduce your use case. The is_secure parameter is supposed to be True, so I don’t know why it returns an http url. Also, the FOOTER_ORGANIZATION_IMAGE setting is supposed to be properly defined. I suggest you try to open a python shell in your lms container and debug this function.