xray_recorder.capture decorator does not show anything on XRAY

I am using Flask to handle requests in my application. My application is on ECS Fargate and I have a separated Docker container in which the XRay daemon resides on it. XRay console shows the requests coming to Flask correctly. So far so good. Here is the code snippet for using Flask middleware:

```
app = Flask(__name__)
xray_recorder.configure(
service="APP",
sampling=True,
context_missing='LOG_ERROR',
plugins=('ECSPlugin',),
daemon_address='127.0.0.1:2000'
)

XRayMiddleware(app, xray_recorder)
```

My problem is when I using `xray_recorder.capture` decorator to my function in other python files, XRay won't show me anything. Here is the code that I used:

```
from aws_xray_sdk.core import xray_recorder
class Test:
def __init__(self):
pass

@xray_recorder.capture('## run')
def run(self):
...
...
...

```

Start with the Flask middleware configuration and the @xray_recorder.capture('## run') decorator on Test.run. Reproduce the request, then compare the middleware-created trace with the decorated method; done means the decorated call appears in the X-Ray console.

索引モデルが issue の本文から書いたものです。