While fixing one issue, we caused another with Apple devices, mostly mobile devices.
Thanks to one of our users reporting this issue, it was fixed fairly quickly. We do try to test everything after a change but this one got missed because this was related to the server level security issues that are well outside of the normal website operations. So we didn't think to test this on our testing iPhone. And iPhones (and a few other Apple devices) were the only things impacted.
Sorry. But at least searching is fixed now.