Minecraft Won't Save Online With 3 Players. (PS4)

I (PS4) Will Be Hosting A Game, Playing Online With Two People On Mobile, And One Person On Nintendo Switch. Once We Have 4 Hours Of Progress, I Go To "Save And Quit". The Save Screen Becomes Stuck On The Chest Icon For 20min. I Then Close Out The Game, Reopen, And All The Progress Is Gone.

How Do I Fix This? 

It's Extremely Frustrating How All Our Progress Is Gone In A Blink.