Metronome starting with delay

[goga]

I recorded a track with the click, next day something weird messes up my session: the metronome is not starting at the moment I press play. It had kindda delay, like a fraction of a second.
Is there any advance function on the metronome that can mess things like this? I cannot figure out how to go on with my session, since everything is now out of sync, and I cannot figure it out.

Any ideea? Thank you.