Hello,
when playing 1000 miles, when you are just about to draw a card and open the context menu, the card appears in the context menu instead of the main list. Of course, it's lost when the context menu is closed. Some other strange behavior is result of that (the card is probably still tracked in some internal data structure despite the main card list showing only 5 cards after your turn, so the list positions aren't correct anymore).
Checking the client state before appending to a list would probably help.
I hope you'll find it useful.