Small/Big dripleaf interacts weirdly with lava

The Bug

When you place a bucket of lava, the lava will not destroy the small/big dripleaf. Lava will just flow (as it would be a normal solid block). It should destroy the block.

Steps to Reproduce

• Place down a small and big dripleaf.
• Place water or lava on top of both the small and big dripleaf.
• Allow some time for the water/lava to flow.
• Take note as to whether or not small and big dripleaves are destroyed by flowing lava or water.

Observed Behavior

Small and big dripleaves are not destroyed by flowing lava or water.

Expected Behavior

Small and big dripleaves would be destroyed by flowing lava or water.