Hello Saqib Sharif ,
Since this is a platform service matter, the engineering team responsible for the Store analytics would be the only ones who can investigate and resolve it.
To get a definitive answer and have your issue properly logged, I would recommend contacting Microsoft Support directly through your Partner Center account. This is the most effective way to bring this specific data discrepancy to the attention of the team that can fix it.
https://partner.microsoft.com/en-us/support?stage=1
Hope this helps!