The glass may form part of the control, sealing and support arrangement. Exact compatibility and proper fitting matter even when heating still works.
What the observation means
Printed sensors and zone markings can differ between variants. A crack cannot be made safe with a visually similar sheet or adhesive.
A useful next step
Stop using damaged glass and provide the full model information for assessment. Do not lift the surface or separate bonded parts yourself. A quote should establish the actual assembly required rather than assume that ordinary cut glass can replace the original component.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.