When loading a world in the snapshot version 19w14b, everything is fine and chunks are not overwritten. After saving and exiting, then opening the same world in 1.14 Pre-release 1, some of the chunks are over written.
MC-147947
Chunks are overwritten when upgrading from 19w14b to 1.14 Pre-release 1
Resolved
Duplicate
1
Ninjawolf0007
(Unassigned)
Unconfirmed
Minecraft 19w14b, Minecraft 1.14 Pre-Release 1
Retrieved
Duplicate of MC-147800. Please use the search function before reporting.