Keep the product, amount, sequence and timing alongside the sound description. A change after treatment is relevant but not a confirmed cause.
What the observation means
A brief different sound and persistent grinding or failed drainage require different responses. Do not repeat the treatment as a test.
A useful next step
Stop using the system if operation is abnormal and seek assessment. Retain the product label and note any interrupted rinse or unexpected fixture use. Do not open the casing or add another cleaner to reverse the sound change.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.