Without any changes to my website, the search form which uses XHR stopped working 5 days ago.
I've been researching the Apple and Google forums to see if either have released updates recently, but two days later and I still can't debug this.
Just now I realized all of the POST examples on AMP-HTML's website don't work on Safari on desktop nor iPhone. Although they work on every other browser:
Replicate Browse to:
https://ampbyexample.com/components/amp-form/
Scroll down past 1st example which uses GET and not POST All the rest do not work and output a general failure error
Please help if you know a work-around for this. I've tried tweaking CORS response headers in every way possible with no luck.