@takayukister – If you read my post you would see I have already read that page and it produced nothing useful. I have covered all the basis mentioned and these issue seems to be localised to the facebook browser (in app) all other browsers work fine and my host settings are setup correctly as it functions normally on other browsers.
I’m having this exact same issue – I’m finding it relates only to the Facebook browser for me and works fine in all other browsers.
This has only started happening in recent updates as its been working flawlessly for years. The above suggested help results in nothing that works. I have already ensured everything is setup correct and my host have checked everything is fine on their end. Other contact form plugins work but I would prefer to keep with Contact form 7 as it works seamlessly with my setup.
Anyone able to produce a fix?
