Chapter 5: The Gunslinger - S1-E5
Plot hole: Something about the timing of the episode does not work. The two pursuers see in their first day of chase a dewback (animal mount). They storm Fennec's position when it gets dark. They quickly capture her, and then Mando wanders the desert to catch the dewback. It takes him the whole night to do so and get back to the encampment, which seems an absurdly long time considering he had it in his sight (and was even sending for it his partner who had no thermal vision). This also implies that Fennec was in the middle of the desert with no mean of transportation of her own.
Chosen answer: They could be just like wrinkles from age, like the elderly Togruta in the Zygerrian slaver arc in The Clone Wars series, as Ahsoka is considerably older than her animated appearances. I think there is probably a character design/stylisation aspect to it as well - the other Togruta we've seen in live action, Shaak Ti, has four segments or folds in her lekku that were not visible in her Clone Wars appearances, so it would seem the character design in Clone Wars and Rebels reduces such features.
Sierra1 ★