Troubleshooting Phoenix Integration: Missing Traces in Cloud App

import os
from dotenv import load_dotenv
from phoenix.otel import register
import openai

load_dotenv('quick-proto/logic_gen/.env')

# Add Phoenix API Key for tracing
PHOENIX_API_KEY = os.environ.get('PHOENIX_API_KEY')
os.environ["PHOENIX_CLIENT_HEADERS"] = f"api_key={PHOENIX_API_KEY}"
os.environ["PHOENIX_COLLECTOR_ENDPOINT"] = "https://app.phoenix.arize.com"

# configure the Phoenix tracer
tracer_provider = register(
  project_name="default", # Default is 'default'
  auto_instrument=True # See 'Trace all calls made to a library' below
)

tracer = tracer_provider.get_tracer(__name__)

client = openai.OpenAI()
response = client.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": "Write a haiku."}],
)
print(response.choices[0].message.content)

🔭 OpenTelemetry Tracing Details 🔭
|  Phoenix Project: default
|  Span Processor: SimpleSpanProcessor
|  Collector Endpoint: https://app.phoenix.arize.com/v1/traces
|  Transport: HTTP + protobuf
|  Transport Headers: {'api_key': '****', 'authorization': '****'}
|  
|  Using a default SpanProcessor. `add_span_processor` will overwrite this default.
|  
|  ⚠️ WARNING: It is strongly advised to use a BatchSpanProcessor in production environments.
|  
|  `register` has set this TracerProvider as the global OpenTelemetry default.
|  To disable this behavior, call `register` with `set_global_tracer_provider=False`.

Whispers through the trees,  
Autumn leaves dance with the breeze,  
Nature's soft embrace.