Hey @Simon_Guthrie, welcome to the forum! 
We recommend using AI FTP Detection whenever it’s available to you. It will help to keep your training steadily progressing.
There have been some recent updates to this feature that allow us to take control of this function in special situations, such as Specialty Phases leading up to a big event. For more info on that, check out that forum post below!
New AI FTP Detection Updates!