State the fitting work, date and first affected function. The installation and appliance may both need consideration.
What the observation means
Clearances, supports, sealing and connections can be disturbed during work. The timing is relevant but does not prove which part caused the symptom.
A useful next step
Stop use for movement, moisture entry, overheating or electrical warning signs. Contact the responsible fitter and keep the repair business informed. Do not attempt to reseat the hob or undo clips to restore the previous arrangement without appropriate competence.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.