The Bug
Strider's take fall damage when falling onto flowing lava despite not taking fall damage on lava source blocks
Reproduce
Create a pool of lava
Get some of the lava to flow
Spawn a strider high up over the flowing lava
Observed Result
The Strider took damage
Expected Result
The Strider wouldn't take damage
Related issues
Comments

Yeah it's MC-197177 didn't come up during my search :/
I can't reproduce the point that striders don't take damage on lava source blocks. Regardless, does MC-197177 describe this issue?