Only use a diffuser or adapter where both appliance and accessory instructions allow it. It changes how heat reaches the cookware and can have its own limits.
What the observation means
An induction hob may prohibit adapter plates. A plate suitable for a gas burner is not automatically suitable for a glass surface.
A useful next step
Check compatibility before purchase or use. Do not improvise with sheet metal, foil or a spare pan base. If the hob overheats or shows warnings after an adapter was introduced, stop using that arrangement and report the accessory details rather than resetting repeatedly.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.