not working correctly

The plugin does what its supposed to do, but I encountered a small issue with it.
After clearing the counter on the interface, the plugin still reads the old data.
For example: executed the plugin on a switch(ex Cat3560x) found on port gi1/0/40 70CRCs. After clearing the counter on the sw, I re-run the plugin and it gave me the same result as before clearing the counter on interface.