Trial of Chaos - impending doom invisible

A problem i am having while running trial of chaos:

The red marker for Impending Doom disapears during the "collect souls" soulcore collection trial. It will start expanding at my feet while i am running distance to get a core, and it travels offscreen. When i run back, it appears to have .... disapeared. It is still there, and when it explodes, it still does damage.

But it is invisible.

Makes the skill to avoid it "memory" instead of "vision", as i have to remember where it spawned, how big the central safe area was... making this trail a bit more tricky than usual.

I don't recall this happening in 0.3.