Large covers can fold or gather during the programme, leaving protected areas with a different drying result. The outside feel does not describe every layer.
Understanding this situation
Check the bedding's drying permission and the model's bulky-item guidance. A cover packed with other items can behave differently from a loosely moving suitable bedding load, even when total dry weight seems modest.
A useful next step
Inspect it after safe normal unloading and finish damp sections according to the label. Do not assume a longer combined cycle is suitable without checking capacity and fabric limits. Report a persistent new change with the actual load arrangement.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.