First time I've seen this. Mekantos flees right on the tick, and the giant tracks immediately. I enter the entangle but never see it go through, though I do not get the normal echo of using a spell without a target, and get the additional status line of the storm giants health, as well as losing 40 mana to the spell. Mekantos later says that he saw the "The thorny plants spring up around a storm giant lieutenant, entangling his legs!" echo, but no damage was dealt.

<768/851hp 469/626m 848/848mv 5 PM 5784tnl>
An elite storm giant soldier's punch DISMEMBERS Mekantos!
An elite storm giant soldier parries your wrath.
Goronik's defilement DISMEMBERS an elite storm giant soldier!
An elite storm giant soldier has some small but disgusting cuts.

<768/851hp 469/626m 848/848mv 5 PM 5784tnl>
Mekantos leaves down.
Mekantos has fled!
An elite storm giant soldier has some small but disgusting cuts.

<768/851hp 469/626m 848/848mv 5 PM 5784tnl> c ent

An elite storm giant soldier checks the ground for tracks.
An elite storm giant soldier leaves down.
You feel less protected from the elements.
======PROTECTION COLD DOWN======
An elite storm giant soldier yells 'Mekantos! Now you die!'
An elite storm giant soldier has some small but disgusting cuts.

<776/851hp 479/626m 848/848mv 5 PM 5784tnl> An elite storm giant soldier has some small but disgusting cuts.

<776/851hp 439/626m 848/848mv 5 PM 5784tnl> d
A Steep and Narrow Path


(Pink Aura) A battle hardened storm giant stands here awaiting the coming invasion.

<776/851hp 439/626m 842/848mv 5 PM 5784tnl> camo
You attempt to camouflage yourself.

<776/851hp 439/626m 842/848mv 5 PM 5784tnl> am giant
You step out from your cover.
======CAMO CAMO CAMO======
Your surprise attack >>> ANNIHILATES <<< an elite storm giant soldier!
You parry an elite storm giant soldier's punch.
An elite storm giant soldier's kick MASSACRES you!
An elite storm giant soldier parries your wrath.
An elite storm giant soldier parries your wrath.
An elite storm giant soldier has some small but disgusting cuts.

This falls into the same category of problem as walking away when someone you are fighting dies. It's an annoyance that is a huge pain to try and fix and doesn't happen nearly often enough to invest the time to do so.