Celery flower does not control work

I am working with celery and flower and RabbitMQ is a message broker. When I have no workers and a task starts, it sits in a queue until a worker starts. Then, when I start my workers, the task is consumed and executed as expected. However, when I try to use the colors API to get the task information, args and kwargs are null. This never happens when my workers are already running when I call the task. Why is this and how can I fix it? Thank.