Hi Tom,
thank you for your quick response.
To clarify again, on Chrome it works well.
My request solely arises from obvious compatibility issues: based on customer feedback, there is the described issue when using EDGE browser.
As we are a web agency that promises modern websites that work smooth on all major plattforms and as we build almost every website on GeneratePress we are currently investigating what causes that issue and hope you could point us in the right direction.