Tooltips in Item Restoration broken, blocked (code 403) by CloudFront

Tooltips on the item selection pages in the Item Restoration Service don’t work and stay stuck at “Loading…”. In Chrome DevTools, it appears that the page tries to load something from tooltip.worldofwarcraft(.)com , which fails with Status Code 403.

For example, this is what I get back with hxxps://tooltip.worldofwarcraft.com/main/item/199429?bg=black&locale=en-US&pl=70&cc=14&bl=8943,6652,7936,8822,8818,9343,1507,8767

403 ERROR
The request could not be satisfied.
Request blocked. We can’t connect to the server for this app or website at this time. There might be too much traffic or a configuration error. Try again later, or contact the app or website owner.
If you provide content to customers through CloudFront, you can find steps to troubleshoot and help prevent this error by reviewing the CloudFront documentation.
Generated by cloudfront (CloudFront)
Request ID: 5BwsMJdQp3bEbYC_jnerQSuVECIjBq7wVwoZTrQAwxP-nf7UTtVeHQ==`