Just in case others test this;
I just tried testing on my Android 10.1 note (2014) tablet and I don’t get the issue on that device.
I also tried on my old Toshiba L500 laptop (which I now use as a media server) and no problem there either. I upgraded this device from Windows 7 Pro to Win 10 Professional.
I seem to only have the problem on my ASUS N550JK laptop. This device has been upgraded from Windows 8.1 Home to Windows 10 Home.
I also tried on my wife N55JK and while it still has the problem directly via browser it doesn’t when running site through responsivepx.com whereas my N550JK does.