Tried everything, speed still drops to 95 Mbps on 5ghz frequency after few hours, I have noticed another thing, I need to change the Ethernet cable ( ISP) from port 1 to 2 and 2 to 1 on the deco if...

Hello, I have a Deco M4 wich is set up to be the main router and the ISP (cat 5e) cable goes directly into the Deco M4 and I do not have any other routers. My issue is that when I restart the router...