Message Monitoring - Shows Number of Messages but no Messages or Data

Hello All,

We are facing an issue in Message Monitoring. When we see the Message Monitoring (Database Overview) for the Adapter Engine. It shows the number of Messages that were Successful,

but if we click the Successful  messages it shows "0 Messages Found"

This was just happening for only Messages which are older than 3 days. Are there any jobs that delete these messages?

We are running on SAP PI 7.31 Dual Installation.

Thanks,

Harsh