It would be good if the grids began to be drawn starting just after the end time of the break since depending on the time of the appointment, the first one after the break can be delayed. Example: schedule from 8:00 a.m. to 5:00 p.m. break from 1:00 p.m. to 3:00 p.m. appointment time 40 minutes. In this case, the first appointment after the break is at 3:20 p.m., so 20 minutes are lost.
Welcome to the Forum @joseluis this is a great suggestion. Currently the way the booking grid is displayed it is on a specific increment (10, 15, 30, 60 min. etc). We can only show start times that fall on these intervals set. In the future we hope to have a more flexible booking grid that will only display the availability based off of the start times you need.