Molten Boulder pushback sometimes broken

I’m seeing the 2.4 molten boulder sometimes pass through some mobs instead of always pushing back mobs compared to the 2.3- slow molten boulder that always pushed back.

Also, it sometimes did no damage when it passed through a Fallen Shaman as one example. And in Chaos sanctuary sometimes it would hit Doom Knights and push back causing several hits. Other times it would hit once then pass right through them.

It also seems to apply +fire skill damage on the tool-tip, but does not apply actual damage in the game.

Is this related to it exploding on impact against certain mobs. Nothing more frustrating than when it blows up on impact.

It like exploding on mobs for short distance now instead of push them back.

No it wasn’t when it exploded on a mob. It gets stuck briefly then goes through them.