@Suty Interestingly it's not an issue on my Macbook Air, also running Chrome. Maybe that'll help them pinpoint the issues.

This is new for me, though maybe it's similar to the issue with animations people were having with Androids and such a while ago? Only some of the swell wavefronts are drawn, and the ones that are drawn flash in and out. You can see them on the righthand side in my screenshot, and them missing from most of the water. Their motion and direction seems correct. This is on PC, windows 10, using Chrome (whatever the latest version I assume because autoupdate...)