I'm syncing my new Sample 2 with two Volca Keys - ie three units in total using Volca Sample clock. The three Sequences play in sync, but then I'll notice a beat skipping. I updated firmware in the Sample, as this unit seems to be the sources of the issue. Everything worked fine, but when I removed the headphone jack it skipped, on two occasions. Is this a coincidence? I'm just hoping I don't have a faulty unit... any advice gratefully received

Jez