Originally posted by Tatsuyo:

Originally posted by Malistair:

Are you playing on a server or locally solo? I have seen this on Reddit/Discord as a latency issue for server players.

I'm playing single player or sometimes with friends. I played with my brother a week ago and everything was fine.

It does seem that there is a bug out there with the boats taking damage due to some form of latency or issues with the way the ocean seams work. I would report it on the dev site to see of many others are experiencing the issue and if they can make a fix. Sorry I cannot help much more than that.