Producers and choregraphers let idolshit have teeny tiny mistakes that dont look awful to sell people on the authenticity and personality of it. The fact that theres an argument about if its on purpose or not indicates that it worked because its in character for Pippaif she says she did it on purpose to be silly she's lying. people mess up choreography all the time, they just do a retake. if they chose not to because it was funny then that's still funny to me.
if she fucked it up and they didn't catch it and it made it into the final product then whoever was in charge of the production needs put to sleep.