I found that I have many unconfirmed transactions from years ago.
Probably those transactions are dropped.

I fix the report by adding 3 additional columns

H      =IF(A2,IF(C2="Payment to yourself",0,1),0)
I       =I3+H2*F2
J       =J1-H2*F2               
And  filling J1 with current balance.

Now summary differs only by 0.001%
I thought it is because of rounding on calculations (it is libre office) so I multiplied all amounts by 100000000.
But still the is the same difference.

I have the same issue.
Summary on exported data for the 2020-08-01 misses about 40% of balance.
The wallet is 5 years old.

It must be something more than "Payment to yourself" records since i removed them manualy.

Any way
I think it would be a good idea to change amount to 0 on "Payment to yourself" lines.
Address column for those record is empty - only transaction id and date are filled.