Invoice details are added in GSTR-1 but GSTR filed with few of invoices

Invoice details are added in GSTR-1 but GSTR filed with few of invoices.

I think one must click on generate summary everytime when you add invoices & click save

If today invoices added and if you want add few more invoices tomorrow then before filing you must click on generate summary.


Is there any way that missing of invoices in GSTR-1 even after adding in GSTR-1 but doesn't reflect in preview of PDF GSTR-1??