Windows client doesn't detect 802.1x on wired connections

We have 802.1x enabled for our wired connections and clients connect and authenticate fine (we also have a guest network for the unauthenticated).

That is - MOST clients authenticate fine. I have one Windows 10 machine that refuses to authenticate and looking at the client-side Wired AutoConfig logs I can see that it doesn't detect any need to perform 802.1x authentication with the error "Windows doesn't detect 802.1x authentication on wired network".

I know for a fact that dot1x is enabled on the port the given machine is connected to (I've even tried other ports in our network just to be safe). Enforcing 802.1x on the connection profile also doesn't help (in this instance our guest network becomes unreachable as well).

Any idea what could cause Windows to flat out not detect the 802.1x on the network?