Broken interaction between Earthshatter and General's Cry

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IonDrako wrote:

If your general's cry summons 5 mirage warriors and they use earthshatter they create their spikes but if you general's cry again and summon 5 more the current spikes just delete themselves instead of shattering.

I'll hope this was an oversight on programming and not the intended interaction as it kind of ruins the build I wanted to do and also makes specifically earthshatter just bad with general's cry.