|Catches fire from lava||
Unknown is a placeholder block exclusive to Bedrock Edition that generates in place where blocks have an invalid ID.
Loading a block with an incorrect ID will result in it being replaced by an Unknown block, although it retains its ID.
Some Marketplace worlds that are meant for older versions of the game can generate this block. These may include worlds that haven’t updated to work with the latest version.
|Pocket Edition Alpha|
|?||A placeholder block was added to represent blocks with invalid IDs.|
|0.5.0||With the addition of tooltips, the placeholder block now displays the name "Unknown".|
|?||"Unknown" can now be obtained with commands.|
|1.16.210||?||"Unknown" can no longer be obtained with commands.|