So had a weird bug yesterday. I have submitted to Stern via email, but wanted to see if anyone has run into this.
TLDR: Had 2 balls locked and lock lit when I started HotK. During HotK, I was in Stark bonus round. I made a left ramp right as the timer hit 1 second. Instead of starting round 2 of HotK, it stopped immediately played Blackwater intro, and began that multiball with its rules, never to go back to HotK again.
Full Details if anyone wants to try and reproduce:
I had started the game with a random selected house (Targaryen), and had moved through the game on ball one. I had completed 4 total houses (Targaryen by default, Stark, Greyjoy and Tyrell. This qualified Hand of the King, which I started. When I started this, I had two balls locked for Blackwater Multiball, and had hit the third lock target, so Lock was blinking for the left ramp.
I made all four shots for the houses for Hand of the King, and hit the battering ram. When I did this, it started the 20 second shooting mode because Stark was one of the completed houses. I had one ball trapped on my left flipper and was just shooting left loops with my other ball. Right as the timer reached 1 second, I shot the left ramp. It made it to the top of the ramp and then was held by the sword. It then immediately ended Hand of the King and began the animation for Blackwater Multiball. It released the two balls held, and never launched a third ball (because the third was already on my flipper). When this multiball ended, it never went to Hand of the King, or showed the score end or anything.
It was like as the Stark shooting mode ended, instead of going back to Hand of the King, Blackwater Multiball had priority and it decided to start that mode, instead of round 2 Hand of the King.