I’ve managed to locate the issue, but still am struggling to find a fix.
It appears that one of the JavaScript files is the one causing the flicker. The file is listed under the JS File Management on the minify page, scripts.min.js.
I’ve tried listing it under JS files not to minify, and have also moved the order in the File Management section, while also trying to change the embed location, but with no success.
Does anyone have any further suggestions?