Hi Tom,
thanks for helping. Good to know it’s nothing to do with GP.
Will ask Elementor support.
Thanks!
Edit: Solved it. For everyone wondering:
In your Dashboard go to Elementor –> Settings –> Advanced. At the very bottom, check “Load Font Awesome 4 support”.
Font Awesome 4 support script (shim.js) is a script that ensures that all previously selected Font Awesome 4 icons are displayed correctly while using the Font Awesome 5 library.
Still wondering what caused this issue. Yesterday I messed around with Autoptimize’s Short Pixel settings that provides WebP format for images. Other than that I did not change anything on my website.
Anyway, thanks for your time. You guys provide a great support!