The lying and hanging position of the ripped towel on the chair behind Cindy changes several times.
When the Soldier enters the swimming pool, his radio is attached to his belt. In the next shot, it is attached to his trousers.
Rosa climbs up the ledge and is soaking wet. In the next shot, she's suddenly half dry.
When the Desk Clerk disinfects his hands, both palms are already covered in soap.
When zooming in on the advertisement, you can clearly see the camera reflecting in the plastic holder.