Pop on a true bypass compressor is unavoidable. When it's sitting there idle, without any signal, the OTA is at maximum amplification. The second any signal comes in, it's going to be massively amplified. The attack just isn't fast enough on the envelope trigger to deal with it. The good news is that most people aren't turning their compressors on and off in the middle of a song, so while the pop may be annoying, it's really not an issue.
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*patience is a virtue*
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