Mod Pack: DW20 1.0.18
Mod: Unknown
What's the bug?: After Updating the pack, several chunks in my world were reset, causing me to lose many parts of my base. Where there was once a room with machines in it is now a half empty room, half filled with dirt and with holes leading outside.
Can it be repeated: Not by me, I did not have a back up world
I had the same thing happen to me on my server. Fortunately I did have a backup. Reverted back to 1.0.16 and the backup copy then had the player remove all of the machines and other blocks from that chunk. Once he did we updated it didn't reset the chunk. So there was something in there that caused this issue. I don't have a clue what block/tile entity it was.