'MAILX sends email but Subject and the Body Text are blank

The following command just started sending an email with a Blank Subject and Body Text.

mailx -s "Daily Extract" $RESULT_EMAIL < $LOG

$RESULT_EMAIL - Contains a Distribution List that has been confirmed.

$LOG - Contains the contents of the email that has been confirmed.

Any ideas why the email is now blank with no subject line?

This is on a PROD server that had normal patching done. Maybe the Java version? Red Hat Server version? mailx doesn't work with version XXX?

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