If you create a stack of planks in lava and then remove the top block and replace it with any other block (Presumably) you will cause the block that was put in place of the wood plank to melt. The wood planks stay intact.
I've never heard of this happening at all. Are you sure it happened on calm mood? Or did this happen to you? It shouldn't happen at all no matter what case it is.
How many blocks was this pillar? Were you experiencing lag or fps issues during the time? Do you remember what map it was on, what mood it was, and what block you replaced it with?
How many blocks was this pillar? Were you experiencing lag or fps issues during the time? Do you remember what map it was on, what mood it was, and what block you replaced it with?
Calm, I put down 3 wood planks though I'm sure it doesn't matter, I had no lag or fps issues and I tested it on 2 different maps so it wasn't map specific. I replaced it with cobblestone.
I've never heard of this happening at all. Are you sure it happened on calm mood? Or did this happen to you? It shouldn't happen at all no matter what case it is.