Discrepancy sales report vs item-wise sales report

ERPNext Reports
1

Hi all, I am facing something bizarre - when I try to pull up “Sales register” report for a certain period (01.12.2019 - 29.02.2020) the system DOES NOT INCLUDE invoices from a certain client. The invoices surely were issued during the same period - when I generate an “Item-wise Sales Register” they show up. Is this a bug of some sort? This does not make any sense - the general and item-wise Sales Register totals should match and THEY DO NOT.

image
image1920×1080 175 KB

image
image1920×1080 275 KB

Sales-item
Sales-item2528×1080 208 KB
Sales-Totals
Sales-Totals2528×1080 130 KB

This might cause a serious issue as I use these reports for my accounting and tax statements. Can somebody please chime in? Thanks

2

Then this is data analysis task as the problem relates to the data for that particular client…