I found 2 bugs!
1st I found happened when a birth scene was going to play, and I entered a door at the same time. I entered the room, the birth scene played immediately, but after the scene ended, the camera effect stayed, so everything looked strange. I fixed it by saving, going to the title, and opening the save again.
2nd I found when fighting the flower-head monsters using the rifle. After killing a flower-head that was very very close to me with the rifle, Syahata didn't exit the aiming state, and wouldn't switch weapons or move. I fixed it by opening and closing the pause menu.
The Christmas stuff was awesome, keep up the good work!