This is likely an effect of perhaps a little bit too much Christmas Cheer a little too early in the day.
Years ago I was in London over the holidays and saw Les Miserables at the matinee and Chess on Christmas Eve. Les Mis was wonderful, even if we were up in the Gods.
Chess, on the other hand, was a complete mess, and not just because it was kind of a mess to begin with. The chick playing Florence (a replacement) was enthralled with the raked stage and all during the mountain scene (now referred to as the terrace scene) kept climbing up to the top, attempting to slide down the rake and giggling. There was also an odd phenomenon of balloons that were loose backstage floating onto the stage, hitting lights, breaking and the cast attempting to catch their remains. By the end of the show, it was fairly clear much of the cast was drunk, or, well, at least too cheerful.
"Love Life. Live." Michael Bennett