Ticker ES
Security Type Future
Market USA
Resolution Minute
Status Waiting Review

There appear to be quite some minute bars with zero volume throughout the entire history, even though I have forward filling disabled. This should be impossible by definition, unless I'm misunderstanding the bar building mechanism.

The price data for these bars seem to be pretty stale, as if forward filled somehow. This leads me to believe it's not just the volume that's off for these bars.

Please see attached algo and log.