I was playing singleplayer vanilla 1.14, and I went to a spawner near my house to grind out some XP. When I went back to my house, most of it was missing.
Most of the doors, wood, and stone blocks had just disappeared. It wasn't a clear cut like when loading a chunk goes wrong. Some of the blocks of the base and the roof were still there, but most of the second floor was gone. Things like beds, furnaces, and stuff like that, were still there floating in the air.
I'm not sure if this information helps, but the dogs from the house ran to me while I was at the spawner.
Does anyone know how this is possible?