Shambler in the tutorial?!

I was restarting cuz Im trying torchless and threw the save basically, and I found a shambler in the corridor in the roads end?!

https://preview.redd.it/3g4163xg9aoh1.jpg?width=1920&format=pjpg&auto=webp&s=af6155ad21e93ba9ab24bbfcbf2f09e91f6dd28b