Why my press button 51822 dead halt

[ehitil]

Press down PWRON1 give rise to Q2 and Q3 conduction, the 51822mcu power on and IO send a hight level to PWRON,to keep VCC_nRF.

At this time press a lot of button will not shutdown 51822 VCC

but..............

PWM work on Specific frequency output ,51822 dead halt,VCC_nRF=0V

I can not find why?Would you please give me advice to help me find the answer

[Michael Antwih]

Are you able to provide a plot in your simulation tool showing the traces? I think explaining the overall goal of the circuit would be helpful as well.