The programme may use that information to choose its cooking sequence or timing. Entering a package weight that includes a container can give it a different input from the one intended.
What the observation means
The correct basis might be the food alone, a particular ingredient or another measurement defined by the manual. Do not assume every automatic programme uses the same rule. A changed result after using a different dish size or entering an estimated weight may reflect those inputs rather than a new appliance fault. The selected food category also matters.
A useful next step
Read the programme's own instructions before starting, and use an appropriate kitchen scale where required. Retain the category, entered weight and container type if you need advice about an unexpectedly short or long cycle. An automatic completion message is not a reason to ignore food that is visibly underprepared. Follow suitable food-safety guidance rather than extending cooking by an unverified guess.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.