They are not ordinary toilet waste and can obstruct or damage the system. A powerful-sounding motor is not permission to process absorbent products.
What the observation means
The manufacturer's permitted-use guidance is the reference. A product disappearing from the bowl does not prove it passed safely through the unit.
A useful next step
Provide a suitable bin and explain the restriction to users. If an item was flushed and operation changed, stop adding water and seek advice. Do not flush repeatedly, reach into the toilet outlet or dismantle the macerator to retrieve it yourself.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.