On models with that feature, it may preserve information about a past temperature rise rather than show the present condition. Check the exact display explanation before interpreting the number.
What the observation tells you
A remembered maximum and a current target answer different questions. Clearing the memory can remove evidence useful after an interruption. The reading also cannot establish the complete history of every food package by itself.
A useful next step
Record the number, unit and warning before acknowledgement. Follow the model instructions and official food-safety guidance. Report both the stored warning and the current operating condition when asking for help.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.