Footer glitch in preview (responsive) mode

Hey guys!

I’ve suddenly run into a really annoying issue while trying to preview my project.

I have a footer designed with auto layout, positioned to stretch left+right and pinned to the bottom. When I place the footer on a page (e.g. the home page) and open the preview in responsive mode, the footer jumps to the top of the page. However, in actual size mode, everything looks fine.
I’ve tried different positioning options, but nothing seems to work. None of the other auto layout sections have this problem, only the footer.

Is this some new Figma glitch, or did I just miss an important step? I’ve been using Figma for a long time, but this one has me stumped.

I’d really appreciate a helping hand! Have a great day, everyone! 🌼