Reports 11g : Duplicate Jobs Created Automatically for Long Running Reports (Doc ID 1122443.1)

Symptoms

When a "long-running report" is executed, the request is successfully submitted to the "Reports Server" and the corresponding job is also visible in the "Current Jobs" option of the "Reports Server Queue".
Every 5 minutes, a "new duplicate job" is automatically created for the same report in the same 'Reports Server Queue', although no new request has been submitted to run that report (Reports job is re-submitted automatically).

The report output is successfully generated for all reports jobs.

The issue reproduces ONLY WHEN using Apache or the webcache URL:

Cause

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