Invisible ground effects

I died twice yesterday to some ground effect I couldn't see, I thought this patch should improve that? I have no idea what killed me, at one instance my ES just dropped when I was fighting a time bubble rare on the way to the copper citadel boss, I ran away, my life continued to drop, dead.

The 2nd time it just made boom and I was down instantly from a normal mob on the way to the stone citadel boss. There was nothing on the ground I could see, nothing. First time ever I died to a mob on the way to the boss. It's like playing the floor is lava with invisible lava or death-laser triggers. Please look into this, seems to be happening in darker maps.