Heads up for all Nintendo switch players: there is a way to get these. Using the spawn command gfi Egg_Deinonychus_Fertilized 1 0 0 you can spawn in seemingly impossible to hatch eggs since they disappear as soon as you drop them. But if you use the egg incubator they hatch with no problems and soon you can breed eggs that aren’t buggy. This might work on different maps for you since it worked for me on island and another person ragnarok. This works with other creatures but I don’t know what other then the ember crystal wyvern.