In a survival realm I have tried to create a Dolphin's Grace farm. I have created a 20 X 20 area to hold the dolphin. This takes place in a coral reef. The dolphin even after naming, putting on lead, it playing with items, etc, it still will despawn and or die. The behavior of all tested dolphins with changes such as despawn prevention methods, enviormental changes, and other mobs/entities in the area. All of these result to the death of the dolphin after leaving the area or after a time of about 10 minutes. The dolphin has access to air and to food regularly and no food at all. Please fix thx. (Before death of dolphin the dolphin goes to a random corner until it dies randomly)