Your software application utilizes a straightforward JSON format for its messages. These JSON messages are then published to Google Cloud Pub/Sub service and subsequently processed using Google Cloud Dataflow, ultimately aiming to generate a real-time dashboard for the Chief Financial Officer (CFO). During the testing phase, you observe that certain messages are not appearing on the dashboard as expected. Upon inspecting the system logs, you confirm that all messages are being successfully published to Google Cloud Pub/Sub. What steps should you take next to resolve this issue?