CORS error in Shapediver, timeout on preflight request?

We are getting occasional CORS errors on a domain that should be whitelisted. It could possibly be (but I’m not certain) that the preflight request times out, and that prevents the subsequent GET request from succeeding/going through.

It might just be intermittent issue on your server (the network is fine, no issue with other requests and latency), but it crashes the whole plugin and it has been happening enough to be a nuisance.

Any suggestions?

My apologies for overlooking your message. Could you share a link of an embedded model that shows the frequent CORS errors for investigation?