An item missed during washing can remain in a pocket and then be exposed to heat and tumbling. The second check can identify hazards such as lighters or electronics as well as loose coins.
Understanding this situation
A successful wash does not prove those objects are safe for the dryer. Small hard items can also make noise or damage garments and accessible surfaces.
A useful next step
Prepare the load while the appliance is stopped and follow garment care. If a dangerous item is suspected inside, stop further use and obtain appropriate guidance. Do not reproduce an abnormal noise to locate it.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.