@KuiyueRO I can’t reproduce the bug anymore and therefore would assumed it’s fixed. Can you confirm?
Edit: Used my own PDFs for testing. It’s the same with your file.
I never came accross a PDF with such different site pages. Is that a real use case?
To be hones I would expect the behaviour currently being there. Even if the pages are a little bit different in size, I want my controls on the sage place if possible.