3 bugs I found are
1) Sometimes when you gift Anna bottle of wine the UI will become unresponsive.
2) The bike minigame won't show the actual game screen - just the UI and black screen. The game runs in the background - it shows score, count time and plays sounds, but it shows just the black screen, so its unplayable.
3) On New Year's Eve Anna will ask you to return some outfit she purchased from the boutique, but the car interaction in the garage is disabled, so you will fail every time.