Glow Lichen is Lava-Proof

What I expected to happen was that the Glow lichen would be destroyed in the lava like what is supposed to happen to all the other plants

But what actually happened was that the Glow Lichen completely blocked off the lava from flowing and redirected it

Steps to Reproduce:
1. place Glow Lichen on a wall
2. place lava on top of the lichen or the block it was placed on
3. Lichen creates an "air pocket"