Hello,
I found bug that biters trying to go through the water because of your mod.
At first I thought that this was a bug behavior of bites in the game and created a bug report for the game. However, they answered me that the reason is your mod. I turned it off and checked - yes it is.
Details of bis bug a wrote there: https://forums.factorio.com/viewtopic.php?f=7&t=84204
