Wanted to chime in since I don’t see anyone here with the opposite opinion. When I did my degree I was always very grateful for the lecturers who would go slower and allow time for you to finish writing notes and really let the material sink in. I think the professor stopping is, at least some of the time, for your own benefit and not theirs, allowing you time to write detailed enough notes. I couldn’t have taken enough notes for an hour class in 20 minutes and also have been able to understand what I was writing.