Why is Feral's cloaking technology better than their future cloaking technology

Why is he still invisible in the god damn water?... I know it's a movie and who cares the bear fight was really cool yada yada yada, I get all of that but it has been established since day 1 that a predator's cloaking technology malfunctions in the water.

This was a core weakness to exploit and is the second piece major information regarding fighting the predator after "if it bleeds" so you'd think this would be something you should remember writing a predator movie. It leads to the first time Dutch sees the Predator with his own eyes and Harrigon getting the first shot on city hunter