Essence Event & Monolith Clash! Bug

Hiya Everybody!

I usually don't have any issues at all, but I've come across this one. Doesn't bother me too much, just posting here to let you know this is happening. I couldn't find another post like it, and it seems something that wouldn't happen a lot anyway.

I came across a Monolith and an Essence Frozen pack of mobs in the same spot. You can see in the screenshot that the Monolith Event has been done. At first, I was going to do the Essence Event and tried to click on the Frozen mob but it wouldn't register my click. I tried to approach from every angle, then I decided that maybe the Monolith was interfering somehow, so I activated the Monolith and completed the Event. Once it was completed I tried to click the frozen mob again, but it still didn't activate. I re-instanced (went back to town then came back), but that didn't help either.

Cheers!

Bug report: 610,490,960

***EDIT***
Ok, I came across another group of frozen mobs for essences and the same thing happened, I couldn't click on it to activate? Weird. So, I tried to take Whirling Blades off my mouse left click, and it worked. So now, it's the Whirling Blades skill that wouldn't allow me to click on the Essence group of frozen mobs??