I feel like I have been running into more transient cross-origin failures in Safari than I used to, when one notebook imports from another (e.g. when a notebook tries to import the new ‘inputs’ notebook). After reloading pages a few times, these go away, but it is still kind of frustrating, and I imagine provides an especially confusing/frustrating experience for new visitors who will just think the page is broken.
Here is a screengrab from my browser console. The bottom failure (“Failed to load resource …”) is actually the only one that seems to be breaking anything here.
Edit: here’s the network tab when it fails:
Or when it works: