@d-healey I haven't posted them. I'd rather not share the specific IR's. I've tested using your hall IR and gotten the same results. It doesn't seem to be about the IR but the voice count. The issue is only happening in the compiled vst.
The pops and clicks disappear when I limit the voice count using the settings comobox, Max Voices, which is strange since my sampler's are already set to Amount, 30 and Soft Limit, 29. Good news, setting the Max Voices to 128, 64 or 32 fixes it. I'm not sure what the exact relationship is between voices and the convolution engine or the max voice setting but it's working.