Ion has a delay after hitting the go button

I have never experienced this issue before. My console seems to be experiencing a delay randomly after hitting the go button. Currently our console has the most recent software release and we are in the midst of our second show. We did not have this problem prior to this show. We do have a small handful of non-conventional units (3 VL3500s, 24 CXI scrollers). It seems to be an intermittent problem so I can not pinpoint one particular instance that triggers this. Any ideas?

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