Small amounts can accumulate until the unit's activation condition is reached. The exact behaviour depends on the model and installation.
What the observation means
A drip can therefore create a different pattern from a continuous large inflow. It does not prove that every intermittent start is explained by the tap.
A useful next step
Note visible drips and which fixtures are connected. Do not run extra water to compare intervals. Have the leak and any persistent pump issue assessed appropriately. Stop using the system if wastewater does not clear or the motor becomes abnormal.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.