If Dense Turf is placed Right next to a river tile in hamlet, boats can just sail on top of it, which causes the boat to break.
Steps to Reproduce
place dense Turf next to a river tile, place a boat and sail onto the dense Turf using the boat
place dense Turf next to a river tile, place a boat and sail onto the dense Turf using the boat
A developer has marked this issue as fixed. This means that the issue has been addressed in the current development build and will likely be in the next update.