I have two live sets.
Sometimes (it happened at least three times over the past few weeks, on two different tablets) when I edit the first set, I find that the second one has been emptied!!!
I am trying to determine how to repro consistently... but it does happen quite frequently and it's highly irritating to lose those lists (I ended up having them written on paper like in the old days to keep rebuild them quickly once this happens.... honestly it's quite ugly; probably some leaking handle if you open one, then the other one, then the first one again.... ?? )