I was just sailing when I accidently burned down my anchor kit. The anchor was lowered when it burned down, and because of that, I couldn't go anywhere, even with oar, even with sail, so I was trapped on the sea. It was so fun because I played with my friend, but I think it's clearly a bug.
(Sorry for my bad English!)
Build a boat with anchor, go away from the land, lower anchor, burn anchor