Jira ALM/QC Synchronization delay


I've made a configuration to synchronize ALM/QC and Jira using MFConnect.

Started connection on MF Connect with a sync frequency of 2 minutes.

1. Created defect in ALM/QC, which Appeared as Bug in Jira ( as Expected).

2. Changed the status from open to in development in Jira (status changed in QC as expected).

But now, when I change the status from in development to in test in Jira, instead of updating the status on QC, the Bug status on Jira reverted back to In Development. 

though the status field is set to sync bidirectionally.

Kindly help with the issue.