When you try uploading/converting A Xbox One Edtion save/world to Bedrock Edition
mobs/entities riding other entities/mobs they will be detached.

Example: If A villager is in A minecart when you convert and try loading the world once its loaded you will see the villager and minecart no longer riding this is A bug
that's effecting my villager sorting machine and my other red-stone mechanics
such as my boat villager elevator they used to be riding the boat but after conversion
they all weren't riding the boat anymore so please look into this issue thanks for listening.