Third rail already told you the reason, #22 is now predicted to arrive into Austin 3+ Hours Late.!
Keep in mind there is Single tracking through Austin from the Lady Bird Lake bridge,past the Station and several miles up MoPac heading North, so this Train can lose even more time, especially with the many Loooong UP Freights on this Line.
(I rode #21 yesterday from Temple to Austin and we were 2 Hours Late into Austin due to 4 Freights getting priority on the Line)