Hub 5 Ethernet vs WiFi

Unboxed my Hub 5 today and set it all up correctly. Anyone have any ideas why when I plug 2 Ethernet cables into my hub the WiFi drops out every time without fail? 

I switched from the Hub 3 this morning with the same Ethernet cables and had no issues like this prior so I’m baffled why this is happening now? I either use my Ethernets for computers or WiFi for phones/TV. I can’t seem to run the 2 at the same time and I can’t find an answer as of yet.

If anyone’s had a similar issue or a possible fix please help me out lol