Dash and Jet Jump do not trigger Enemy Spotted, versus making Movement to that location. I am still early in the game so these are the only movement abilities I can reference. Line of Sight seems a bit iffy in spotting an enemy as well. Sometimes visually I see the character has clear LoS, but if I go back further behind the rocks in this video, I seem to spot the enemy where I would think I do not have LoS.
Weirdly there’s another thread in which some says that dash DOES trigger enemy spotted and they wish it didn’t because it stops their dash instantly when triggering it.
So maybe there was a patch that changed it (before/between) your observations?
Of course following that logic, spotting an enemy would cause your jump jet to crash, so it probably doesn’t trigger on purpose?