Raspberry PI 3 Network Slowdown

[Fabricio20]

Hey peeps, I'm currently having an issue with my Raspberry PI 3 (Model B).

 

If I plug the Pi3 into my network (cable or WiFi), after a while (an hour? 30 mins), everything starts to slow down. Packet loss goes way up and after some hours, everything is dead (100% packet loss).

 

Every device connected to both WiFi and Cable just dies out.

 

This is exclusive to the Raspberry Pi 3, no other device on the entire network causes this. This is not related to the OS it seems, as I've seen this happening on Raspbian and Ubuntu (raw) as well as HomeAssistant.

 

I'm running an ISP-Provided Modem and a Mesh WiFi Router (Tenda Nova).

 

Any tips on debugging this? I really want my Pi3 Working 

[Sealance]

have you tried a usb nic to see if the issue persists?