Last year I got my car back after having the entire cooling system replaced (due to a car accident, it was in the shop for 2 months). The very second day I had it, this exact thing happened. Opened the hood and coolant has sprayed absolutely everywhere. I was worried the system was completely fucked, but after refilling like 2 entire jugs of the liquid it was fine. They seriously just didn’t screw the cap on. Really scared me I’d be stuck without a car even longer than the 2 months I’d already gone without one.