[Python] Azure function visibility

I have created an HTTP trigger function that sends a message to a Service Bus queue in Azure. Below, I will attach the function code as well as the binding files.

The issue is that sometimes the function is no longer visible in Azure Functions, even though no configuration changes have been made.

What do you think could be the issue?

function_app.py code :

@app.route(route="http_trigger")
@app.service_bus_queue_output(arg_name="msgout", queue_name="ftdx", connection="AzureWebJobsServiceBus")

def http_trigger(req: func.HttpRequest, msgout: func.Out[str]) -> func.HttpResponse:
"""Azure Function HTTP trigger that sends messages to Service Bus."""
logging.info('Python HTTP trigger function processed a request.')

try:
req_body = req.get_json()
message_body = req_body.get("message")

if not message_body:
return func.HttpResponse("Invalid request: 'message' field is required", status_code=400)

# Send message to Service Bus
msgout.set(message_body)

return func.HttpResponse("Message sent to Service Bus.", status_code=200)

except ValueError:
return func.HttpResponse("Invalid JSON payload", status_code=400)


function.json:

{
"bindings": [
{
"type": "httpTrigger",
"direction": "in",
"authLevel": "function",
"methods": ["post"]
},
{
"type": "http",
"direction": "out"
},
{
"type": "serviceBus",
"direction": "out",
"name": "msgout",
"queueName": "ftdx",
"connection": "AzureWebJobsServiceBus"
}
],
"scriptFile": "function_app.py"
}


host.json:

"version": "2.0",
"logging": {
"applicationInsights": {
"samplingSettings": {
"isEnabled": true,
"excludedTypes": "Request"
}
}
},
"extensionBundle": {
"id": "Microsoft.Azure.Functions.ExtensionBundle",
"version": "[4.*, 5.0.0)"
}
}


local.setting.json:

{
"IsEncrypted": false,
"Values": {
"AzureWebJobsStorage": "UseDevelopmentStorage=true",
"FUNCTIONS_WORKER_RUNTIME": "python",
"AzureWebJobsServiceBus": "myKey"
}
}


The issue is that sometimes the function is no longer visible in Azure Functions, even though no configuration changes have been made.

What do you think could be the issue?

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