Not necessarily. The accessory and hob have separate power and communication roles. Identify which item the warning concerns.
What the observation means
A wireless sensor may require its own approved battery procedure, while another model may use a different arrangement. The main hob can have unrelated restrictions on sensor modes.
A useful next step
Follow the accessory manual and use the specified replacement only where owner replacement is permitted. Do not continue sensor-controlled cooking with unreliable readings. Report persistent warnings with both hob and accessory references rather than assuming the entire hob needs replacement.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.