Hyperdrive USB-C hub and HDMI (to hdmi or dvi)

Hi,

I have a macbookpro 15 inch with touchbar.

When I plug in my usb-c hub, (which has 2 usb-c connecters, 2 usb 3.1, SD-card slot, sd-mini and HDMI) everything works fine.

Until I connect my hdmi to an external display (with hdmi or dvi). The internet connectivity or speed is (s)lower.

After many calls with apple support they concluded that the macbook pro is working just fine???

The supplier of the usb-c hub concluded that it’s working fine as well...

Has anyone noticed or experienced this problem before?