This has happened twice in 24 hours but I don't know the steps to repro it. It's only happened in an negotiation encounter.
During a Negotiation encounter, I will select a card to play. Instead of playing the card, I lose the ability to do anything to advance the turn. I can still navigate on the UI and menus. The cards show the other cards in my hand, which I can hover but not select to use and the arrow indicator on where to place the effect doesn't come up. The card I had tried to play still shows up in my hand, but I can't hover or select. Hitting X does not end my turn even though it shows up in the UI. I can only view card details, inspect arguments, and navigate the status UI and menu.
Video of my flailing attempts to progress the encounter attached.