playBunny: You may have missed part of the conversation, as it started on the other board. They were already told to use small pieces to avoid it. However, this is something new, as it seems to be this way even in small pieces.
However, it would be interesting to know what is different about Carl as he has seemingly said it looks normal to him.
playBunny: your links shows the same problem... missing pieces even under small sized boards... as your links are old games it means it is not a new problem but it appears already since years....