I went to your website and tried to troubleshoot the case. Unfortunately, I could not find the problem cause. I am willing to investigate more, but it will require staging website. The current website that you have is live and I cannot risk disabling plugins or changing the theme to test.
This is not part of our support as there is a conflict with a third-party plug-in that we do not support. Please kindly consider this as an extra step to be able to help you find the problem cause and report it to the plug-in developer.
We are going to wait for the staging version of the website to follow up the case and give you the troubleshooting report.
Thank you for your understanding.