The card disappears when you triple-click it.

[albertomichel2010]

The game works perfectly fine. I never saw this problem in version 2.20. I was used to double-clicking to move the cards, but in this version, the card sometimes disappears, forcing me to restart the game. It happens with both right and left clicks. I'm using version 3.6.0

[albertomichel2010]

Game Union-Square
If you click too many times on a stack of cards, it will go into Disable mode.

[joeraz]

Noted. It seems a double right-click on an empty stack screws up the timing. It doesn't recognize the double-click, but recognizes it as two quick right-clicks, which throws off the timing.

I'll have to look into this further.