Could you please specify information provided from the issue template thank you.

I also have the same issue with Dacite slabs.

Specifically when broken with a diamond pickaxe, but I haven't really tried anything else out

Mod conflict? If so, please clarify which mod is conflicting!
Unlikely. But for completeness sake, the version of All of Fabric 3 I am using apparently uses BYG version 1.1.2.

API/Modloader
Fabric

Describe the bug
Soapstone brick slabs are un-harvestable using pickaxes. Using Hwyla, the effective tool is shovels.

To Reproduce

1. Obtain soapstone.
2. Use a stonecutter to produce soapstone brick blocks, which are harvestable with pickaxes
3. Use a stonecutter to produce soapstone brick slabs using soapstone brick blocks.
4. Place soapstone brick slab anywhere. Attempt to harvest soapstone brick slab with pickaxes, ranging from stone, iron to diamond.

Expected behavior
By rights, like it's originating block, soapstone brick slabs should be harverstable using pickaxes instead of shovels.

Screenshots/Videos

Additional context
As stated above, I'm using All of Fabric 3, version 2.3.4, The BYG version used in AOF3 appears to be 1.1.2.

Logs
None applicable.

fixed issues were it had shovel as it's harvest tool