Some bugs are hard to reproduce because the reporter left out some explanation you'd need. In that case we have no other means but to request some more information. Bugs for which feedback from the reporter has been requested should be put here. They should be revisited in 30 days to see if there's any response. If there's feedback
Feedback should only be requested for bugs if you have tried and failed to reproduce them or if the report contains insufficient information to try and reproduce the bug. Requesting feedback for a bug should be seen as a last resort only.