Our current meter is showing a reading but no current readings are displayed on the screen or in the log file, why?

The current value may not be displayed if the duration that the current flows, is below 1 second. The current is still measured and taken into account for the energy consumption. So if the current flows for very short periods of time, then it will not be recorded. The overall energy usage will still be recorded accurately

Another reason is if the 3000A coil is used, and the current flow is less than 3A, then it can not be measured.