Not necessarily. An automatic reservoir may have emptied during the programme, or the selected cycle may have used a manual dose. The reservoir level and the completed programme need to be considered together.
Understanding this situation
Look at the relevant indicator and the manual's description of low-product warnings. A warning can be an instruction to refill for a subsequent cycle rather than proof that the previous load received no detergent. Equally, assuming automatic dosing occurred when it was disabled can explain a disappointing result without identifying an electrical fault.
A useful next step
Record the dosing setting that was actually selected, any warning timing and whether you added a manual product. Refill only with the approved product type and quantity. If the reservoir repeatedly empties unusually quickly or the machine reports a dispensing problem, seek model-specific guidance rather than bypassing it with repeated extra doses.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.