Player get extra Damage on Lava

Unknowingly, when I accident touch lava since I played Minecraft survival so I notice some unknown lava get extra damage from the player.

 

The version that effected 1.18.31 (Not 1.18.32)

 

I don't see a Duplicate if it exists (So I Make a report in any way)

 

Observed results:

Player get extra damage on Lava (Not works when touch on the corner or edge)

 

Expected results:

The player supposes to get Minimal impact Damage on Lava.