Gara nullifying Protea

[(XBOX)Quik8201]

If this was intended, it's very bad design, but Protea's 4th ability seems to be nullified/interrupted by Gara's Spectrorage and Mass Vitrify. It seemed as if Protea's grenade fan ability may be mitigated by the same abilities, but I'm less sure of this. Playing defense missions with Gara and my friend playing as Protea, we had to split the map to avoid conflicting with one another. He would be in the middle of building up damage in his 4th, hit my mirrors and his ability would reset completely, leaving him out the damage he had built as well as the energy he had spent. The same goes for if he were to run into my mass vitrify. Please fix!