Thanks for the reply Matte, but I think there is another issue here.
The internal monitor was off. The pops are not in the audio files themselves but only appear during playback of a sequence. These are virtual pops!
Does popping occur because there are different sample rates of audio in the same sequence? Why are some files 48khz and others 47999.5khz? What would be an easy way to make all audio files the same sample rate? I’m already way into my project.