Dragging effect from instrument chain search box scrolls mixer window

So I’ve got main window in mixer view on left display (win7 64, r3b2 64)
sampler on right display, both maximised
going to effects page in sampler. create fx chain. type in some vst name, drag it to the chain (not the full size chain but the miniature display above)

dnd works and snaps like a charm

of course dnd works somewhat, but mixer view seems to scroll tracks (up to far right track) while dragging, awkward because I’m not dragging from or to that window.