Plaster, grout, sealant and other materials are not normal wastewater. They can enter fixtures during work even if the pump itself was not altered.
What the observation means
A change immediately after renovation therefore needs that history. A sink connection does not make the unit a disposal route for cleaning tools.
A useful next step
Stop using an affected system and explain the materials involved. Do not flush extra water to move debris through or add chemicals to dissolve it. Appropriate assessment should establish the route and damage before ordinary use resumes.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.