Silesaurus walking on water

I had hunt a alpha quest ,so I went there, it was a Silesaurus and it chase me,the first time it was normal swimming after me then I got away so it went back, I heal up and try again to hunt it,then I jump of like a hill into the water and it also jump after me but instead of swimming it started to walk on water after me and wont returned to land,then I went back to heal up then went in the water after it,once I die it look like it started to swim

It just walk on water after it jump after me

The ai should do the swimming animation