Hello @weymann,
I’ve observed a similar anomaly on my public dashboard, which appears to be stemming from a call to /api/frontend-metrics. The development team has successfully identified the problematic code, as documented in this GitHub issue: Task: avoid Unauthorized frontend-metrics call when it's a public route · Issue #76995 · grafana/grafana · GitHub.
To address this issue, a pull request has been reviewed and merged (see [v10.2.x] Identity: Fix org role none comparison by grafana-delivery-bot[bot] · Pull Request #77001 · grafana/grafana · GitHub). The forthcoming release, v10.2.1, is slated to incorporate this resolution.
Best regards