LTM8074 generate -8V output and when make the RUN pin to low,-8V output still exists on the output

Dear ADI colleagues,

My customer use LTM8074 to generate -8V output voltage and it is ok.But when the customer want to shutdown the output of LTM8074 by connect RUN pin to GND,it cannot work.-8V output still exist on the output of LTM8074.I attach the schematic as follows，and the green components in the schematic are not mounted.

please help check when output negative voltage,if it's possible to use RUN pin(connect to <0.9V) to shutdown the LTM8074.

with best regards&thank

Heng