Traffic Analyzer - Statistic - Nothing presented

I turn this on, and I get nothing. No clients, no apps, no traffic, though for sure there are all 3. The Traffic monitor tab is picking up traffic across all interfaces.

I did poke around and this is probably an easy one, just can't figure it out.

I am on 378.55 on an RT 68R. JFSS is on (its forced on), QOS and logged packets are on.

Any help appreciated. Thanks.

Paul