Man these art boards are shocking I've just exported a load of art boards and the mask that was holding my smart object disappeared leaving it hanging out the side of my mask!! i didn't noticed and sent to client. then i exported another load of artboards and photoshop decided to shrink my smart object by 50%. what is going on. I am defiantly on the latest version i updated a few weeks ago. I'm not joking artboards have been photoshops worst addition ever.