The two loads bring different amounts of heat and involve different capacity guidance. Saying only 'I filled the freezer' leaves out a key part of the operating conditions.
What the observation tells you
Fresh food needs to be frozen through, while properly transported frozen purchases primarily need continued storage. Both can obstruct vents if packed badly. A large fresh batch may require preparation and a specified mode that frozen shopping does not.
A useful next step
Record which type was added, the approximate quantity and the timing. Follow the model's limits and preserve safe food handling. That gives an engineer a more useful account of the temperature change.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.