Who cares about this kind of spooky mistake?

Smort

Ahh, i see what you did with the title there... noice

This is a fake news but yeah, who cares!

It’s probably on the ocean floor

This happened in 2017. The submarine is INS Arihant, the rear hatch was left open by mistake, letting sea water in. The submarine was inoperable for 10 months while repairs were done. The submarine was not lost, though. Source : Wikipedia