It's been at least three weeks now, the game can enter the Bubblegum Hill menu but crashes upon selecting the first level. And unlike with regular levels, even after crashing once (and removing a life in the process), it doesn't load properly the second time. Best I could get was by disabling Internet connection right before selecting the first Bubblegum Hill level, and even then no graphics were loaded, it was just a pink screen. It's no big deal if there are still technical limitations that make Bubblegum Hill unavailable for WP players, but at least the game shouldn't dangle that possibility in front of players if it's going to be locked out.
Thank you for your attention.