Even after the https://hub.spigotmc.org/stash/projects/SPIGOT/repos/craftbukkit/commits/8fda4b12fd066f53d2c0035d4aba3b04cdc49bb7 commit which altered the source block of a sculk and sculk_vein BlockSpreadEvent, I am seeing BlockSpreadEvents that have source blocks of Sculk and Sculk_Vein.

Using code that checks if a sculk_catalyst is in an area that cannot build into the second area where sculk is spreading I am able to deny the BlockSpreadEvent when it is a sculk block being made, but not when it is a sculk_vein that is being made.

I'm not sure if its intentional for sculk and sculk_vein's to still show up as a Source block. I know it has to creep from somewhere but with the current implementation not always pointing to the Sculk_Catalyst makes it a bit tricky to tell if someone is trying to grow sculk into areas they cannot otherwise build in.