Hi Experts,
I'm using Apex 19.1 with ords 19.1 and Oracle RDBMS 12cR2. I've created a page that contains an IG that is being populated with > 1k number of rows. The issue here is that if I click on checkbox in header to select all rows only a few hundreds are marked:

The pagination type is "Scroll", heading is set to "Fixed to Page" and Lazy Loading is set to "No".
Any help is appreciated.
Thanks,
mätes.
Update:
For those who can/want help example: https://apex.oracle.com/pls/apex/f?p=73957
User: Guest
PW: mutti123
Even in example app selecting all rows only affects 56 rows instead of all rows.
Regards,
mätes