@Kevin_Z with reset, I mean Reboot from the app. After it reboots the internet speed goes back to normal. Here is another screenshot showing more variations on WAN speed.

@Kevin_Z that is actual WAN speed, measured by the router itself (see picture) or using Speedtest on my wired AppleTV or using an Internet test set. the other problem with the WiFi side is that my...

After three months fighting with my cable provider; making them replace their coax drop, spending money on a new top-of-the-line DOCSIS3,1 modem, we finally came to the conclusion that the...