SEP detects threats in Manual scan but left alone in schedule scan

SEP detects threats in Manual scan but left alone in schedule scan.Both the scan are done with latest same defenetion sets and administrative previlages.On Scedule scan it left the threat as Left alone with 0 bytes file size in risk log while doing manual right click scan it detects the threat and shows the file size.The file not locked with any software.

Regards,

Kannan.R