Errattic / "sticky" free movement of PDF content when part of a group


I’m trying to create zoomable PDF content with a few buttons and interactive elements overlayed upon it as part of a group.

However, I’ve noticed that although the PDF asset is freely dragable when not part of a group, when it’s part of the group and the group is set to ‘Allow move’ under constraints, it’s draggable but much less responsive / “sticky” (quite often when you try to drag it or click and drag, it doesn’t move). This behaviour seems to be quite erratic.

Has anyone else experienced this issue and if so can it be prevented?