As captioned, especailly save and quit more than one time without closing software.
The tentative solution is after each save press home button close the apps in home screen to force close minecraft apps without latest saving.
Reboot switch unit each time before open Minecraft may help on such case, but it is not reasonable.
Related issues
is duplicated by
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Update: regular reboot (around 3-5 save then one reboot the device) the switch seems can help the saving hang issue.

Regularly reboot the switch may help on this case but seems not reasonable.
If saving game crashed and force closed the apps, the save will be recovered as last save stage (i.e. before entering the game stage) and all unsaved progress will be lost which is frustrated.
However, on bedrock edition seems the only wait to surely save game is using "Save & Quit" function in game.

Please pay attention and put this bug as high priority since I am suffering save and hang issue everyday and lost my progress for each time.
For those experiencing the bug - do you have any resource packs applied (to the world or globally)?

I dont have any resource packs applied on mine, I do get an error occasionally when I first start up minecraft that it failed to load the global resource pack

I’m not too sure, but I think my game started crashing more frequently when I started using a texture pack, specifically the Texture Update pack.

I turned off all texture packs and the first time I left a world the game still crashed. I can usually only get the game to somewhat reliably save the first time I try leaving, all subsequent attempts result in a crash almost always.

Copy the world without the texture packs if you on Pocket edition

Has anyone come with a reliable workaround for this? I've put down the game for now as it's almost impossible to play due to every time I leave a world no progress is saved. Hopefully this is fixed in the next update.

Oh didn't see the open ticket before making mine.
I'm having a similar issue with mine as well. Bought the hard copy of the game a few days ago, and it's unplayable now from the ridiculous crashing. Started out with the save icon always up, which caused the chunk rendering to be so slow that my sprinting speed catches up to the edge. It used to freeze up during some random saves, and would have go to the home menu and restart as described above.
Now the world won't even load anymore with the same crash message "The software was closed because an error occurred". I even have my rendering and graphic on the lowest possible.
Would like a new update for this fix to be pushed ASAP.

Seems many ppls suffer on this issue.
My sure workaround is:
1. Reboot and safe for first launch when saving game (reboot each play ? ohno!)
2. Regularly backup (i.e. copy) the world....may help not to cause total loss.....
This particular crashing issue should be fixed in 1.11. However, we are investigating a newer incidence of the issue that appears to occur when the game is reading or writing during auto/saving/loading at MCPE-45862, so please feel free to add any new information there.
⚠️ Please do not mark issues as private, unless your bug report is an exploit or contains information about your username or server.