After re-logging, coming out of the Neither or, travelling long distances my bed and minecarts have been disappearing. 

The beds are still in place in my house you can break them and replace them. However if you place a block where the pillow goes on the bed the entity is deleted.

Most of the times my hopper minecarts that are helping me farm are stopping after returning from the Neither. however I was a long distance away and came back through the Neither and both cart were 100% gone.

I don't know what is causing them to disappear, I couldn't see anyone else report this bug and I hope its not too much trouble.