X-UA-Compatible header | Internet Explorer

Hello team,

I’m using the theme Enigma (Version: 2.5 – free version) on 2 of my websites and I have a problem when opening them on Internet Explorer.

I have the X-UA-Compatible meta tag included on both headers, even included a function to force it but even with this, when I open these websites on Internet Explorer, instead of opening in its latest version available (Edge or 11), it opens by default on document 9.

Has this ever happened to you? Is there something that I’m missing?

Thank you!