Interface (BPS in out) only showing one sample per day

Have an existing SW Orion v11.5 that used to show bandwidth usage (Min/Max/Average bps In/Out) of interfaces every five or 15 minutes depending on individual device settings.  Now it is only showing one sample per day.  Check the settings and it is polling every 15 minutes.  Changed it to poll every five minutes on some nodes with no change.  Additionally, some devices show Data is not available.  What could be causing this.