Cards won't show face up on table

Hi folks -  If I drag a card (default standard playing card deck) onto the table face up, it won't show.  It seemingly disappears.  If I drag a card to the table face down, it will show face down, BUT....if I try to flip the card over face up, it may show the first card I flip, and the rest revert to the disappearing act.    And when I go to recall, it does show that the cards are in play. I've tested and tried to troubleshoot this issue from every angle and no luck.    I have cleared the cache, disabled add-ons, and tried on different browsers and different computers.  No luck.     T his problem does seem contained to only one of my game sessions, which is my oldest with the most content.   Edit: The problem is happening (coincidentally?) on two of my older game sessions, the ones with most content.   I tested on a different game session and it seems to work okay.   And I also tested under a different account on the same machine in a brand new session and it seems to work okay also. I don't want to have to delete and rebuild a 54 card deck from scratch only to find out the problem persists.  Any advice?

Update: I had to rebuild a 54-card deck by scratch.  This new one seems to be working (for now?!?).  Wish there was an easier option to import or reset the default card deck.

I and one of my players had this on one of our games (though it had no more or less content than any other). The default card deck would not show for us, even though it was fine for other players. The deck icon showed only as a broken image and while we could draw cards we couldn't see them. We tried the standard things of logging out/using different browsers but no luck. In the end we made a new deck, which so far is fine for all players.