PS4 Multiplayer won’t save and hangs game

In a new world created about 2 weeks ago, we played multiplayer last weekend for several hours (1st time in this world) and when closing the game it hung on the Saving World screen. There’s no way out of this screen other than to close the application. When reopening the game it showed the correct date and there was also a save file with a screen grab of progress made. However, upon opening the world, it had reverted to the previous save point. This has now happened three times. When playing solo, the world appears to save correctly. Last weekend was on PS update version 2.55 and yesterday we saw the 2.56 update loaded Thursday. Then today have the on screen Minecraft 1.19 update announcement. We have tried waiting over 30 minutes each time before closing the game.