I have multiple slots on each day, and the duration and slot step is set to 60 minutes for each service I offer. I have an appointment that is from 23:45-00:45 (one hour) but since it does not support over midnight bookings, I have to set it to 23:45-23:59. If I try to book this appointment, the whole day is set to red / booked. Bug? Here is a video demonstrating