Why audit rules with "exit" filter do not generate any audit events?

Issue

• Why audit rules with "exit" filter do not generate any audit events?
• The issue can be reproduced using below rule.

# auditctl -D
# auditctl -a always,exit -F arch=b64 -F success=1 -S sync -k key-sync
# sync
# ausearch -sc sync
<no logs printed>