I play minecraft with my 2 kids on the Xbox in split screen. Since this weeks update to minecraft when we open a pre existing world the world owners progress and inventory is loaded. However, the split screen users are loaded as new users at the world spawn. No exp or inventory is loaded for them when there should be. 

this is hugely upsetting to my children who have lost months of progress and can no longer control their pets. I can see hundreds of other players posting about this in the Microsoft forum. Please issue a fix as high priority.