Nadeem,
Thank you for using the Cisco Support Community for ACI. I believe this issue is hardware specific and not related to ACI. That said, the issue with this defect is being investigated and addressed. To verify that your device is running into this issue, Please Open a Cisco TAC Case so that a Cisco Support Engineer can verify that your device is running into this issue and provide a solution for you.
Please have you model# and serial# handy when you open the TAC Case.
Thanks!
T.