What appears to be happening is that zeroing the figure affects something that needs to be set at 1.

The dial in question should be labelled something like "INVThreeFinger" in each hand, and I suspect might be hidden.

The quickest thing to try is select each hand and then Edit | Restore | Element (or use Ctrl-E).
Otherwise you'll need to unhide the dial and set the value back manually or make a PZ2 to do it.

Going by DavidGB's D|S script there's also a "INVNeckGon" in the neck which also needs to be set to 1 (no idea if it not being so will cause similar problems) but the cure will be as above but for the neck.