Still affects 1.21.90.
Still affects 1.21.51.
Affects 1.21.51.
Affects 1.21.50.
@SaveTheBedrock, I've checked their coordinates and the stone slabs are situated at Y=33, which means they are above the second layer Y=32.
Maybe it has something to do with the integer power of 2. I highly recommend you to see whether the top layer disappears exactly above Y=16, 32, 128, 256, etc.
Can confirm the bug. I'm surprised that this hasn't been fixed.
I found the problem in year 2022 and a self-placed top layer made of stone slabs disappeared. The missing area was exactly 16*16 and the total area of stone slabs was several chunks. It's worth noticing that Y=64 is not a neccessary condition of missing the top layer. The world I was in is in vanilla single player survival mode.
@SaveTheBedrock, does this bug only happen to stone variants?
Still affects version 1.21.44.
Affects all 1.21.X versions.
Affects 1.21.50.
Still affects 1.21.43.
Affects 1.21.41.
It's an annoying bug, please fix this.
Still affects 1.21.44.
Still affects 1.21.50.
Still affects 1.21.31.
Affects 1.21.31.
Affects 1.20.12.
Affects 1.19.51, occurs at both sunrise and sunset.
Can confirm in 1.19.51: this happened after quitting The Hive.
Also, some tips for players of Bedrock Edition to prevent any corruption:
Always close and restart the game before you load any of your SSP world after quitting a server.
If you find yourself lost your inventory, an immediate reload of the world will help.
Copy the world every time after quitting it.
(Optional) Regularly save your worlds into a durable storage like HDD from your device. This will prevent some unpredictable failures of your own devices.
Affects 1.19.30 (lag occurs while dragging a shulker box with caught Buckets of Tropical Fish).
Still affects 1.21.101.