Do not treat it as permitted toilet waste. Its material and behaviour in water can be unsuitable even when the quantity seems small.
What the observation means
A product label about ordinary drainage does not override the macerator instructions. Additional flushing can move a problem into a less accessible part of the system.
A useful next step
Use an appropriate disposal route and keep litter out. If it was introduced and operation changed, stop using connected fixtures and give the service team the product details. Do not add boiling water or chemicals to dissolve it.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.