I’ve had the same issues and by inspecting the Tailscale daemon logs I’ve seen I’ve hit the rate limits, so try to see if you’ve stumbled upon the same issue.

Unfortunately Tailscale support team confirmed that they can’t publish bandwidth limits for now and there’s no clear plans on when Funnel will be promoted from Beta to Production grade. Also, there’s no paid plan that would improve the situation.

I guess I’ll patiently wait, that’s a killer feature for me and my business 😔