SAP PP-PI Issue "Time Unit" - Confirmations of Process Orders creating significant Variances

Hello,

During confirmation of process order using COR6N, for activities unit is coming as MIN and other 4 activities are coming blank. These blank ones are getting multiplied by 60. This is causing significant variances.

Note: This is not happening all the time. Once in a while happening. Please anyone can suggest for this.capture.png