Has anyone experienced suddenly not being sable to put the Aeris f10 v2 into freedive mode? It's happened twice before, but on those occasions it suddenly worked as it should after a few minutes in the sea. Alas not this time. Instead of switching to freedive mode, it now displays zeroes all over the screen for a few seconds before returning to the normal watch display. I've been using it for two-three years, changed battery once. Tried taking the battery out and putting it back in, no change in behavior.