Have you ever got a situation that while working on a CMS (like this Drupal piece of shit), you wake some JavaScript code up?

Lead dev : "Yeah the zoom doesn't work anymore, go and debug it"
Me : "k I'm on it"
*Opens file, start to put 3 or 4 console.log() around to see where things start to break
*it breaks since the beginning why not*
*Starts to play around with variables*
*Result are 'normal'*
*Change edited line to what it was before*
*Code works fine*
*What the hell*
*Git revert /js/script.js*
*Empties cache*
*Code works as it was supposed to do before*

I swear to god I work here since January, this is the 3rd time it happens. Now I'm sure the project has a soul since it stole it from the developers that worked on it before me