Have you tried enabling the “Layout Adjustment” feature and then carrying out change of Page size?
Adobe InDesign teamLasse Kolb commented
we found a kind of solution:
I chosed from the Edit-Menu "Liquid Layout", and checked the rule "Erneut zentrieren" (Re-Center) and disabled all other options.
It seems, that solved my problem.
As confirmed by the user, the issue is resolved.