RNBO_Metro External Sync (Ableton)

Mario Falcone's icon

Hello, I'm working on my effect using RNBO, and I've decided to sync it to an external sync, in this case Live, but when I add the Lock 1 attribute to the metro object, the first bang is skipped. How can I resolve this?
I'm using:
Max 8.5.5
RNBO 1.2.1
Live 11.2.11