It might be something called wlan autoconfig.
I thought they had patched it but windows likes to periodically scan for any available wireless connections and this can causes latency issues.
You can manually disable it from the cmd, or in the registry editor somewhere, i haven’t done it for years but its something like
"netsh wlan set autoconfig enabled=no interface=“Wireless Network Connection”"
Oh you said your PS4 is doing it too, AND wired connection, i should probably read :)