Big download overloads network GS108Ev3

Hi all,

Since a few days I installed two GS108E switches in my home.

Almost everything works fine, except when I start a big download on my Playstation 5. When it's downloading a game the webinterface of both switches becomes unresponsive, also IPTV stops working. When I pause the download on the playstation everything goes back to normal instantly.

To me feels like the GS108E can't handle the traffic. 

I tried setting up QoS and updating the firmware of both GS108E, but this didn't solve the problem. 

This is the setup of my network 

Router

    |

GS108E --> Devices

    |

GS108E --> Devices (including the playstation)

Hopefully anyone knows how to solve this. 

Regards,

Joost