Incorrect data in pdf-report

Good day, while generating pdf-report for the current month, the graph of the current month in the block “Visits summary” is dropped and zero, although visits are stable, and the table below the graph contains all the data. See screenshot - http://cl.ly/image/3o2b2U2Z1o1C. It was also in the previous months, but each new month - the data for the previous month on the graph are present correctly. Checked the settings in the unit “System check” - no errors were detected. The problem started after the upgrade to version 1.12.