Grafana supports both reporting spans and forwarding tracing IDs. It would be great if the image renderer could do so as well (or at least forward the tracing ID back to grafana).
That would enable an unbroken trace from an image rendering request (or even before that) all the way to the datasource like e.g. prometheus, which has recently added support for tracing as well.
Right now when rendering images, you see two independent traces being reported: One for the original request, and one by the image-renderer when it calls back to grafana.