Maybe it’s a issue of DJI FLy drones. I knew ,that they abort the mission if the sign is lost. But (I think) I remenber to change the the speed of the Mini2 using the right stick. I sold the Mini2 and can’t test this.
I did a “blind” (with no sign) mission with the Mavic2Pro and it did perform different speeds at each waypoint.
Choose automatic translation in your language from the esperanto subtitles. In esperanto each word has only one meaning, so it´s better for automatic translations.