Have you seen this with other Synths or just Serum. I noticed a timing issue in Cubase with Avenger and keilwerth had it fixed within a few days. it was to do with the 2ms of delay (look ahead) from the limiter… PDC. Things like this that we presume work and often go unnoticed bother me deeply, eager to learn of what the issue is. Thank you for bringing it up, my threads are usually ignored.