Generally speaking, the door with solid wood veneer will not fall off, which is thought to be completed under the temperature and pressure of 360 tons 180 degrees. Don't worry, it will never fall off, but you must buy a big brand when you buy a wooden door, because many small wooden doors are done by glue and hand, such as pressing them with hundreds of kilograms of cement sand. Such a door will not fall off within 1 year, but it will take a long time.
I hope my answer will satisfy you and let you know something about choosing wooden doors.