Open new tab results in: "Disconnected: Did not receive auth message within 10 seconds"

Configuration
1

I have a weird issue, if I am logged into my Home Assistant account on a browser (Firefox) and open a new tab by middle clicking my mouse button, like when I configure lovelace I like to have another tab open showing the result without having to go out of Configuration-mode.
Home Assistant will freeze up, and checking the log I can see:
homeassistant.components.websocket_api.http.connection] Disconnected: Did not receive auth message within 10 seconds

Home Assistant remains frozen for a couple of minutes, before it start working normally again. But the same thing happens if I open a new tab.
If I try this locally (with internal IP) I don’t have this issue. It only occurs on my external domain which is pointed to my internal Home Assistant IP through NGINX Reverse Proxy.

How do I solve this, anyone else experience this?

2

I see this in the log too:

Logger: aiohttp.server
Källa: /usr/local/lib/python3.12/site-packages/aiohttp/web_protocol.py:421
Inträffade först: 13:20:21 (2 händelser)
Senast loggade: 13:22:11

Error handling request
Traceback (most recent call last):
  File "/usr/local/lib/python3.12/site-packages/aiohttp/web_protocol.py", line 452, in _handle_request
    resp = await request_handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/aiohttp/web_app.py", line 543, in _handle
    resp = await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/aiohttp/web_middlewares.py", line 114, in impl
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/homeassistant/components/http/security_filter.py", line 92, in security_filter_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/homeassistant/components/http/forwarded.py", line 210, in forwarded_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/homeassistant/components/http/request_context.py", line 26, in request_context_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/homeassistant/components/http/ban.py", line 88, in ban_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/aiohttp_session/__init__.py", line 199, in factory
    response = await handler(request)
               ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/homeassistant/components/http/auth.py", line 295, in auth_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/homeassistant/components/http/headers.py", line 32, in headers_middleware
    response = await handler(request)
               ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/homeassistant/helpers/http.py", line 73, in handle
    result = await handler(request, **request.match_info)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/homeassistant/components/websocket_api/http.py", line 53, in get
    return await WebSocketHandler(request.app[KEY_HASS], request).async_handle()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/homeassistant/components/websocket_api/http.py", line 286, in async_handle
    await wsock.prepare(request)
  File "/usr/local/lib/python3.12/site-packages/aiohttp/web_ws.py", line 152, in prepare
    payload_writer = await super().prepare(request)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/aiohttp/web_response.py", line 417, in prepare
    return await self._start(request)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/aiohttp/web_response.py", line 425, in _start
    await self._write_headers()
  File "/usr/local/lib/python3.12/site-packages/aiohttp/web_response.py", line 505, in _write_headers
    await writer.write_headers(status_line, self._headers)
  File "/usr/local/lib/python3.12/site-packages/aiohttp/http_writer.py", line 130, in write_headers
    self._write(buf)
  File "/usr/local/lib/python3.12/site-packages/aiohttp/http_writer.py", line 75, in _write
    raise ConnectionResetError("Cannot write to closing transport")
ConnectionResetError: Cannot write to closing transport

Logger: homeassistant
Källa: /usr/local/lib/python3.12/site-packages/homeassistant/runner.py:147
Inträffade först: 13:23:42 (1 händelser)
Senast loggade: 13:23:42

Error doing job: Task exception was never retrieved
Traceback (most recent call last):
  File "/usr/local/lib/python3.12/site-packages/aiohttp/http_websocket.py", line 715, in ping
    await self._send_frame(message, WSMsgType.PING)
  File "/usr/local/lib/python3.12/site-packages/aiohttp/http_websocket.py", line 682, in _send_frame
    self._write(header + message)
  File "/usr/local/lib/python3.12/site-packages/aiohttp/http_websocket.py", line 702, in _write
    raise ConnectionResetError("Cannot write to closing transport")
ConnectionResetError: Cannot write to closing transport