Plonk Playing Tripplets or seriously delayed trigger - no idea why

I just got a plonk off Reverb, and I’m using a Pamelas New Workout to trigger Plonk.

When I send a trigger (4:4 123BPM) I get a hat sound, followed by another slightly different hat sound. I’m seeing the A+B lights toggle between each other, but it definitely sounds like it’s double or triple triggering (trig, delay note, trig OR trig delay note delay note trig)

It was recommended that I checked PNWs gate output, and it’s confirmed in the “Gate Square” mode.

No idea how to proceed. Any help is much appreciated.

Are you on the latest Plonk firmware? Version 1.11 adds a latency setting that might sort this out.