I was browsing Stack Overflow and clicked the Q to ask a question. I changed the site to Meta. Once I posted the question it failed to load.
I guess it was because it tried to load it from Stack Overflow. I clicked retry, but no luck.
Haven't been able to repro this from posting a question on another site while looking at a site's question list, nor from looking at a question's details and posting a question on another site.
If you can find more detailed repro steps please let me know, else for now this is a status-norepro