An oven component may include coatings, bearings, finishes or construction not suited to dishwasher cleaning. Cooking heat resistance does not establish detergent or prolonged-water compatibility.
Understanding this situation
The oven manual and component instructions take precedence over a general claim that dishwasher cycles clean greasy metal. Large parts can also obstruct the dishwasher's spray or dispenser.
A useful next step
Load only explicitly suitable parts in a permitted arrangement. Do not remove protective finishes through repeated intensive washing. If a part changes or sheds material, stop using the damaged component and disclose what was washed before a dishwasher assessment.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.