Yes, I only recently installed it.
I saw a post somewhere from almost 2 years ago, where someone was asking about this exact feature [Userscript] Self-Study Quiz - #1022 by Matto-chan and @rfindley responded saying that it requires the companion script “Self-Study Hide Info”: [Userscript] Self-Study Hide Info, so most likely that is the reason.
@DeadByCoffee Sorry for changing topics to a different UserScript.