Edit: Hey now, looks like it’s broken on meta too!
Searched through the forum but didn’t find anything current on this one. Running 3.3.0.beta2-dev ( 8346f4a1e6 ).
When trying to post an Amazon link, an error results. On my forum I disabled the Amazon affiliate plugin, disabled cloudflare, turned off all content/adblocking, issue still occurs. But since it’s broken here on meta also, seems to be a real bug with no further explanation required.
The bug being reported here is similar to CNN oneboxing failure - #12 by tgxworld. A fix has been implemented so I will expect the reliability of onebox to improve after the fix has been shipped.
I am able to onebox all the reported links locally with my fix.