Help with adding/fixing water to my world

So a few questions-
Has anyone had trouble with the standard assets unity water? My friend on VR said he can see holes in the water. (I am a desktop user, but he’s shown me screen shots.) (Link to the screen shot for example.)
If anyone knows how to fix it- it would be greatly appreciated!

Another question- is there any better alternatives to the standard asset water if so? I also tried the “SilVR water shader” but it wasnt what I wanted.

Any help would be appreciated!