Yeah, can confirm the same here. This seems to be the most frequent failure mode that I see with my use of Tunnels. Existing connections will continue working, but attempts to create new ones (or other changes) fail. Ie. the control plane fails more often than the core connectivity service.

I certainly prefer that failure mode to the opposite, but I do find the status information on Cloudflare's page to be very confusing about this.

Tunnels as a product is essentially heavily degraded (putting it lightly) and yet it's listed currently as "Cloudflare Tunnel: restored" [0]

https://www.cloudflarestatus.com [0]

Edit: also having used Shopify's CLI a little, one thing I noticed immediately is how opaque the whole thing is. They want to push you down a very specific path, and don't provide a lot of information if you want to take a bit more control over your dev process (as I always want to do) which directly leads to points of failure like this. From your GitHub links it looks like devs are struggling to figure out how to quickly switch to a different reverse proxy.