Removed "json_" prefixes from all columns and converted columns to actual JSON types. Also removed all converged columns and converted contents to regular columns.
It will now attempt to resume the sync if it fails. This will still require a refresh on the browser or at the very least the cron job will pick up the slack.
While I have the connectNulls option left disabled, I was not adding null values to the series. So Highcharts was just connecting the values because it didn't know any better.