Bookings seem to have disappeared in the Hourline but I can see them in the Project, why?

In the Hourline you can choose different view modes from the Hourline icon > View Mode."Booked Only" means it show the actual booked time in/out of the booking. "Used/Booked" will mean the booking visually updates it's time in/out on the Hourline when the Time Report was made. "Used Only" will only show time reported hours, so if a Booking wasn't time reported it doesn't show in this View Mode.