Deck piece alternating between zone and deck - what am I doing wrong?

I have a panel with an infinite supply on resource bits (say, wood, and there’s a similar one with coins). Players drag them to a board where I have a zone set up for the resources they have. I also have a deck for their bits. It all works, but in the chat I notice that if I neaten up the bits, every other time I drag them around a little they are either in the zone, or in the deck. It doesn’t matter where exactly in the area I move them. Every move it alternates. What is going on?

Here’s a sample (with some editing) from the chat window:

  • …Resource-Wood created in Player 1 Resources *
  • …Resource-Wood moves Player 1 Resources → ResourcesZone *
  • …Resource-Wood moves ResourcesZone → Player 1 Resources *
  • …Resource-Wood moves Player 1 Resources → ResourcesZone *
  • …Resource-Wood moves ResourcesZone → Player 1 Resources *

I playtested yesterday and this was a big hassle. Not only the problem above, but sometimes the menus to discard or clone a resource piece was available, and sometimes it wasn’t. I’m pretty sure this all relates - the pieces are either in the zone or the deck, but not both or something like that. Help anyone?

I couldn’t begin to diagnose this unless I had the module. If you can share it via cloud storage or similar, the odds of resolution go way up.