On numerous occasions I have drops Arcane summoning pet and then Either the Explosive Sigil or the lighting one. I have noticed that if 1 mob comes towards me nothing will go off. It almost appears as since the mob is dead center with me he is out of range.

This has happened not once or twice, but Numerous times. I believe there is a dead zone in between the Sigils. I have moved a few times to force the Sigils to go off or take effect.

Anyone else have this happen to them