The "Wait" glitch is actually not a glitch, it's just an April Fools joke, since this same "glitch" is used in another joke hack that was posted today.
If I knew something about FE Hacking except for basic Nightmare modules stuff then I could remove that "glitch" and play it normally like 1 day earlier before Arch releases the "no-joke" version. Ah well. Here's to hope he'll release it soon.