Moving pasted images through layer above

[Ofnuts]

This is the standard operation of the Move tool (and has always been, as far as my memories go), it picks the topmost opaque layer. You can temporarily disable this by using shift-click, you can also tick the "Move the active layer" option in the Move tool, and you possibly set that as a default in your previous version (the standard behavior makes more sense in the long run, if you know how to bypass it when needed).