This is Not for all the scheduled Jobs. This issue is happening only for 3 scheduled Jobs.
Also we have recreated the scheduled Jobs(From May 26, 4:30 PM IST), but Initially there were no issues, only 1 report has been generated. But the duplicate report issue has again reoccurred from the next day of schedule creation(From May 27, 2:30 AM IST). Please find the below screenshot.
Also find the below screenshot, where the particular Job is running 3 times from May 28. 12:30 PM IST.
UMP Version : 8.4.7