I play Bedrock Edition on PC (Minecraft for windows 10) and in my survival world that I have been playing for quite some time. I have an issue. In the "Bedrock Chunks" picture towards the bottom left side of the image with the ocean and the village, the chunks I explored saved properly, it is a "solid" path, I explored those chunks a couple updates ago so the problem seems to be somewhat recent. If you look towards the right side of the same image "Bedrock Chunks" to an area I explored recently with the Mesa and Savana, when looking in Universal MC Editor, 30-40% the chunks I have rendered/seen in game are still "deleted/blank" with no consistency to their position. These "reset" chunks are left open to new world gen which causes problems shown in the "chunk error" pictures below as in new updates, new terrain try's to blend with little to no space. I don't know how to fix this issue, Java doesn't have this problem as you can see in the "Java Chunks" picture, what you render/see in game is set in stone but in Bedrock the "saving" is VERY patchy, the patchy areas in the right side of the Bedrock image was fully rendered and visible in game, I saw all of that terrain in game but as you can see half is still blank. I have tried a restart of my pc, reinstall of Minecraft, making a new world but to no avail, this is a current problem I have in Bedrock. If this is a storage saving measure, than a toggle for proper saving of chunks would solve this problem and prevent damadge to already explored areas.