While moving a villager (librarian, unbreaking 3, for 21 emeralds) in a boar attached by a lead, my game crashed. All nearby entities despawned including a sheep and said villager.  Other than being sad about my villager, this isn’t a serious serious issue that I’ve experienced so far. It may have been an issue with me entering my house, connecting to the wifi that has been shut off (a connectable signal with no connection to the internet). However, Minecraft really shouldn’t have issues with networking after the initial sign-in.