Working on a bug that in my opinion never worked. “Sr. Dev” dares to say the function has worked before. I’m a 100% sure it never did.
“Yes but everything is being tested before we go live.”

Dude, we have a monkey testing our stuff are you serious!?

Ignorance is bliss

Same here.

Me: It never worked, main logic is missing.

Other dev: It works, it's active in my project for 3 years

Me: Whatever works in your project must be some other side effect, it's not the code that was added 3 years ago and was never touched since then.