SignalR Subscription Not Working In Containerized Blazor WASM App on NginX

I am building a Blazor Web Assembly app that uses SignalR that reaches out to a hub that lives in a docker container. When I run Blazor locally everything works fine, even when the hub is in the container. However, when I containerize the Blazor app with docker and run with nginx it doesn't work. I've tried having blazor reach out to the dub container directly and through a reverse proxy using nginx.conf to no avail. Here's what I know:

1. The containerized Blazor app is successfully linking up to the hub and communication is flowing back and forth between the two. I know this be I can see the traffic on the websocket in the network tab of the dev tools in the browser. The traffic is the same traffic that I see when I run Blazor locally. The subscription just isn't getting hit. It's like I have no subscription at all.

Here's my code in the hub and the Blazor app along with my nginx.conf

Hub

    await foreach (var stream in _accessor.ChatAsync(messages, model))    {        responseStreams.Add(stream);        await Clients.Caller.SendAsync("ReceiveMessage", "test usernam", stream);    }

Blazor

    hubConnection = hubAccessor.GetHubConnection();    hubConnection.On<string, ChatResponseStream>("ReceiveMessage", (user, chunk) =>    {        ProcessChunk(chunk);        InvokeAsync(StateHasChanged);    });    await hubConnection.StartAsync();

nginx.conf

    events {}    http {        include /etc/nginx/mime.types;        server {            listen 7070;            server_name localhost;            root /usr/share/nginx/html;            index index.html;            location / {                try_files $uri $uri/ /index.html;            }            location /chathub {                proxy_http_version 1.1;                proxy_set_header Upgrade $http_upgrade;                proxy_set_header Connection "upgrade";                proxy_pass "http://chathub:8080/chathub";            }        }    }

Any help would be greatly appreciated as I have been dealing with this for several days now.