I am having this issue on PS4 too, after the 1.19.71/2 update and now its got to the point were I cannot open my worlds on PS4 which makes the game unplayable. I am very annoyed I can't play the game.
I made a bug report early today that I cannot open worlds or play server because the game keeps locking up (get stuck).
I hope they fix these issues soon because my game is unplayable!
UPDATE with new information: I was able to fix my Minecraft PS4 by uninstalling and reinstalling the game, and deleting my saved data. When I loaded the game up after the patches had installed, I had to fix my settings and log back into my Microsoft account but, after I did that I was able to load up my worlds up and play online on servers again as the server packs downloaded with out the game locking up.
What I think happen was after I updated to 1.19.71 the game broke due to the bug were the game thought that it was outdated and realms did not work, that code must have stayed when I updated to 1.19.72 everything was still broken. I could be wrong but, who knows with Minecraft Bedrock and its bugs!
I think this bug report will stay open as this stuff should not happen and you should not need to reinstall the game every time bugs occur and doing this is only a tempoary fix according to research I did when I had this bug. I hope I do not need to reinstall Minecraft on PS4 for a while at least and I hope that this bug gets fixed in the near future!