An update: using your code (the snippet above) I was getting no scalars when simply installing ultralytics and clearml packages using pip. Because indeed tensorboard is not installed. When I do install tensorboard, I get metrics in like normal, so I can't seem to reproduce the issue when tensorboard is correctly installed. That said, maybe we should look at not having this dependency 🤔

Would you mind posting a pip freeze of your environment that you're using to run yolo?