If MaxCrashReportsSize is not reached and crashes are still deleted
it is probably a bug. What OS (distro and version) are you using?
Fedora 25. Any details to attach to the bug?
If you install packages manually from koji, package are not signed
and you have to
set 'OpenGPGCheck' option to 'yes' in
/etc/abrt/abrt-action-save-package-data.conf
to catch such a crashes.
Thanks!
Removing /var/spool/abrt/last-ccpp file should help.
Matej
Thank you!