Do not use a dishwasher tablet in the disposer unless the disposer manufacturer explicitly approves that product and method. A chemical formulated for a dishwasher's controlled cycle is not automatically suitable for a sink appliance.
What the observation tells you
Dropping a tablet into the chamber does not provide the temperature, dilution or rinse conditions of a dishwasher programme. It also adds uncertainty when other cleaning products may be present in the drain. Do not combine it with bleach or another remedy.
A useful next step
Use the approved disposer cleaning routine instead. If a product has already caused foaming or irritation, stop use and follow its safety instructions before further work.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.