Why does water continue to flow into the pan after flushing?

Why does water continue to flow into the pan after flushing?

There are lots of reasons for this see the main below:
1 The float height on the inlet valve could be set too high allowing the water to flow into the internal overflow (refer the end user to the installation instructions and advise to set the float to the correct position)
2 The inlet valve could have developed a fault and not closing off properly causing the water level to spill into the internal overflow (Advise to inspect and repair or replace valve and/or seal)
3 The installation site could have low water pressure and not allowing the inlet valve to close (fluidmaster only) causing overfilling (advise the end user to contact their supplier and ask for a Fluid master ultra low pressure seal part: 242lp071)
4 The Diaphragm washer could be faulty (replace the Diaphragm washer)
5 The Drop valve could be faulty (replace the Drop valve).