I've also tried to recreate this and it just seems to be random, some hang up in the code where the animation is supposed to end but the game is skipping that part for some reason. Same FPS drop as the rest as well, I'll be around 40+ in the winter zone with everything maxed then it's borderline slideshow mode once the…
I'm late to the winter event due to just joining the game but that "multiple stars per day" part made me very happy, so it's a bummer that it didn't work out. No complaints, stuff happens, just my two cents. Hope everything goes well with the patch.