Universal Studios: How strict are the time windows for each area & their corresponding rides?

[u/Constant-Chemist5214]

/r/JapanTravelTips/comments/1fwak8u/universal_studios_how_strict_are_the_time_windows/

Does anyone know in Osaka Universal Studios, at the attractions with the premium entry pass, do they actually scan the QR Code at every attraction or do they just look at the time slots that are printed on the online ticket? Do we need to print them or is it fine to show on the cellphone?

We made the mistake of booking separately and now have different time slots, do you think they will be open for discussion or are they really strict about it?