Nuendo 6.5 64/ win 7 64 Spikes

I’m getting spikes in the VST performance meter. Rebuilt the preferences. Realized when I turned off Eiosis Air EQ, the spikes went away-happy guy! Until…I opened another song and more spikes! The culprit turned out to be Waldorf PPG3.
Went online, downloaded the 64 bit ver. of PPG, this time, no spikes. Could this be a VST Bridge issue? More investigation needed…