Describe the refrigerated items and their positions, along with the freezer observation. This differs from the whole appliance simply being set too cold.
What the observation tells you
Food touching a cold wall or outlet can behave differently from items elsewhere. A changed fridge target or special mode may also matter. The apparently normal freezer does not identify a failed sensor in the other compartment.
A useful next step
Check the permitted loading arrangement and record both settings. Use suitable temperature evidence and note whether freezing affects one location or the whole fridge. Do not alter both controls indiscriminately.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.