Different thicknesses can release moisture at different rates. Mixing light shirts with dense towels can leave an uneven finish even when the selected programme ends normally.
Understanding this situation
The load still has to meet the fabric and capacity limits for both stages. A setting suitable for robust towels is not automatically suitable for the shirts, particularly where trims or care restrictions differ.
A useful next step
Separate compatible drying groups before starting continuous treatment. If a mixed load is already safely finished, use each garment's permitted finishing method. Avoid applying more heat to everything simply because the heaviest item remains damp.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.