Ive seen this mainly with gravel in the nether but, once made to fall into a certain depth of lava (both flowing and still) it despawns.
Ive seen this mainly with gravel in the nether but, once made to fall into a certain depth of lava (both flowing and still) it despawns.
Are you sure it doesn't just fall on the bottom of the lake? Please note that gravel falling on soul sand will pop off, that is intentional.