Description:

• The plank block does not produce the same sound as vanilla planks when you would expect it to since it is a form of composite wood. It also is not flammable when it is made out of wood.

Steps to Reproduce:

• Place a plank block
• Preform any kind of interaction with it (break it, walk on it, etc)
• The sounds that stone uses will be produced instead
• Also light it on fire
• It will not burn

Technical Information:

• Minecraft: 1.16.5
• Fabric API: 0.32.5
• Industrial Revolution: 1.9.0-BETA

I am still able to reproduce this with 1.9.1-BETA. The planks are still fire proof, and have the stone block sounds. Also the block hardness values are incorrect if you want the block to mimic a plank block. In IRBlockRegistry.kt, the hardness is set to three and the blast resistance to six. According to the Minecraft Wiki, wood planks have a hardness of two and a blast resistance of three.

Ok now it's actually fixed as of 1.9.3