app_task() function bug ambiguity

[MrdUkk]

provided zigbee examples have ambiguity in calling app_key_handler() function.

probably this is a bug? take a look:

/app/sampleGateway/sampleGateway.c
app_task() calls app_key_handler() in bdb idle condition

/app/sampleSensor/sampleSensor.c
app_task() calls app_key_handler() twice when PM_ENABLE is defined, second time when bdb is in idle condition

/app/sampleSwitch/sampleSwitch.c
app_task() calls app_key_handler() twice when PM_ENABLE is defined, second time when bdb is in idle condition

/app/sampleLigth/sampleLight.c
app_task() calls app_key_handler() without bdb idle condition. Why?