Two copies of the face are moved apart by half the colour distance each way and painted in the left and right colours; where they overlap, the face is refilled in the text colour, so a spot-colour face stays on its own plate. Then horizontal bands across the whole word are cut out and shifted left or right. With Random off the bands are even and alternate direction; with Random on their height, position and shift vary from a seed, so a re-render reproduces the same glitch and Reroll gives a new one. All vector, no transparency.
Glitch is applied as an Illustrator live effect, so the text stays editable. Change the word, the font, or any slider afterwards, and save the result as a Graphic Style to reuse it.
How to make a glitch text effect in Illustrator → walks through the manual Illustrator steps, then shows the one-click version.