Rest Doesn't Work Anymore?

So I was testing my fangame as usual, when I noticed that the move Rest didn't want to work any more. Instead, the game went straight to dealing with the next Pokémon's move immediately after the "X used Y!" message appeared, completely ignoring Rest's effects. I gave one of my Pokémon the moves Rest, Recover, Synthesis and Giga Drain so I could see if they were all broken, but only Rest didn't work. I also added the effects of Desolate Land, Primordial Sea and Delta Stream recently. Not sure if that's related to the problem, but I'll say that just in case.

What parts of what scripts should I be looking at if I want to fix this?

EDIT: I just replaced Essentials v14's move effect with v13's, and Rest seems to be working perfectly now. Can someone lock this thread please?