Using an Artnet timecode source, I was unable to get Onyx to learn timings from pressing Main Go. Instead, it inserted a zero timecode into the cue. If I used the internal timecode source, Onyx learned the correct timings.
Edit: I’ve uploaded a screenshot showing the issue on a fresh install. This was taken just after pressing Main Go.
Thanks for reporting this, indeed it seems to stamp 0:00 even with valid TC coming in. We will investigate this. Can you say in what version # you used this last successfully?