I have not used Affinity Publisher much yet but have just started using it and am trying to move a Frame Text without snapping (i.e fine movements). According to the help text at the bottom of the screen when I hover over a Frame Text object it says 'Alt to ignore snapping'. When I try to use this option by holding down ALT and dragging the object it does seem to ignore snapping, but also duplicates it (. Simple task which I don't that my lack of use of publisher is showing or if there is a bug, which if there was Im sure would have been identified by now.
N.B. I've just found out how to move without snapping. So just in case anyone else is confused as I was. You first have to click, hold and start moving the object before you press ALT. This worked for me, but I am sure there is an easier way of doing this (and if not there should be).