Constant stacktraces "Unexpected ASGI message 'websocket.close', after sending 'websocket.close'."

### Describe the bug

```
{"auth_via": "unauthenticated", "domain_url": "localhost", "event": "/-/health/live/", "host": "localhost:8000", "level": "info", "logger": "authentik.asgi", "method": "GET", "pid": 43, "remote": "255.255.255.255", "request_id": "066906afc5a94c0681604303a1f3f5e1", "runtime": 15, "schema_name": "public", "scheme": "http", "status": 200, "timestamp": "2026-04-11T15:28:12.914626", "user": "", "user_agent": "goauthentik.io/router/healthcheck"}
{"auth_via": "secret_key", "domain_url": null, "event": "runtime error during accept", "exc": "RuntimeError(\"Expected ASGI message 'websocket.send' or 'websocket.close', but got 'websocket.accept'.\")", "level": "warning", "logger": "authentik.outposts.consumer", "outpost": "", "pid": 43, "schema_name": "public", "timestamp": "2026-04-11T15:28:13.595281"}
{"auth_via": "secret_key", "domain_url": null, "event": "Exception in ASGI application", "exc": "ClientDisconnected()", "level": "warning", "logger": "authentik.asgi", "pid": 43, "schema_name": "public", "timestamp": "2026-04-11T15:28:13.596887"}
Exception in ASGI application
Traceback (most recent call last):
File "/ak-root/.venv/lib/python3.14/site-packages/uvicorn/protocols/websockets/wsproto_impl.py", line 235, in run_asgi
result = await self.app(self.scope, self.receive, self.send) # type: ignore[func-returns-value]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/ak-root/.venv/lib/python3.14/site-packages/uvicorn/middleware/proxy_headers.py", line 60, in __call__
return await self.app(scope, receive, send)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/ak-root/.venv/lib/python3.14/site-packages/sentry_sdk/integrations/asgi.py", line 170, in _run_asgi3
return await self._run_app(scope, receive, send, asgi_version=3)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/ak-root/.venv/lib/python3.14/site-packages/sentry_sdk/integrations/asgi.py", line 262, in _run_app
raise exc from None
File "/ak-root/.venv/lib/python3.14/site-packages/sentry_sdk/integrations/asgi.py", line 257, in _run_app
return await self.app(
^^^^^^^^^^^^^^^
scope, receive, _sentry_wrapped_send
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/ak-root/.venv/lib/python3.14/site-packages/channels/routing.py", line 48, in __call__
return await application(scope, receive, send)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/authentik/root/asgi.py", line 56, in __call__
return await self.app(scope, receive, send)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/ak-root/.venv/lib/python3.14/site-packages/channels/routing.py", line 118, in __call__
return await application(
^^^^^^^^^^^^^^^^^^
...<10 lines>...
)
^
File "/ak-root/.venv/lib/python3.14/site-packages/channels/routing.py", line 118, in __call__
return await application(
^^^^^^^^^^^^^^^^^^
...<10 lines>...
)
^
File "/authentik/root/middleware.py", line 303, in __call__
return await send({"type": "websocket.close"})
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/ak-root/.venv/lib/python3.14/site-packages/sentry_sdk/integrations/asgi.py", line 250, in _sentry_wrapped_send
return await send(event)
^^^^^^^^^^^^^^^^^
File "/ak-root/.venv/lib/python3.14/site-packages/uvicorn/protocols/websockets/wsproto_impl.py", line 368, in send
raise RuntimeError(msg % message_type)
RuntimeError: Unexpected ASGI message 'websocket.close', after sending 'websocket.close'.
{"auth_via": "unauthenticated", "domain_url": "localhost", "event": "/-/health/live/", "host": "localhost:8000", "level": "info", "logger": "authentik.asgi", "method": "GET", "pid": 42, "remote": "255.255.255.255", "request_id": "176676f470ff4569b52fbc94cc9d3a21", "runtime": 59, "schema_name": "public", "scheme": "http", "status": 200, "timestamp": "2026-04-11T15:28:22.988490", "user": "", "user_agent": "goauthentik.io/router/healthcheck"}
{"auth_via": "unauthenticated", "domain_url": "localhost", "event": "/-/health/live/", "host": "localhost:8000", "level": "info", "logger": "authentik.asgi", "method": "GET", "pid": 43, "remote": "255.255.255.255", "request_id": "0be0cb18fe594ca6a1392c433c332115", "runtime": 31, "schema_name": "public", "scheme": "http", "status": 200, "timestamp": "2026-04-11T15:28:32.981089", "user": "", "user_agent": "goauthentik.io/router/healthcheck"}
```

Generally the whole authenti server feels much slower now than before the update. the liveness probe takes over 3 seconds to respond on same hardware.

### How to reproduce

I dont know, I just updated my kubernetes helm chart to 2026.2.2 and then this started happening

### Expected behavior

No such errors in the log?

### Screenshots

_No response_

### Additional context

_No response_

### Deployment Method

Kubernetes

### Version

2026.2.2

### Relevant log output

```shell

```

Start with /authentik/root/middleware.py around line 303 and /authentik/root/asgi.py around line 56, then trace the websocket message lifecycle shown in the stack trace. Reproduce on Kubernetes with Helm chart version 2026.2.2 and compare liveness-probe latency. Done means the duplicate websocket-close errors are no longer logged and the reported slowdown is explained or resolved.

Written by the indexing model from the issue text.