Can you be more specific on works but only after...consumption?

I tested on WSTK(BRD4304A), it works well.

Do you have a WSTK to check it directly.

To solved the problem,  we should first locate the problem.

Are you use a custom board?  What is the schematic?

I'm not sure if I2C cause it, can you check this by a HW cut/remove?

Any new?

Please check attached file, if it works for you?

I checked with BRD4257A, base on Flex SDK 2.6.4.0,wire-replacement example, It works.

The default PHY is PHY_Connect_902MHz_2GFSK_200kbps.

So the first concern is are you tested with antenna? 

Or have you changed to 2.4G PHY for a test?

Are you test on your custom board or our WSTK?

--------

/**
 * @brief The node timed out waiting for a response during the joining process.
 */
  EMBER_JOIN_TIMEOUT = 0x96,

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Would you check switch_led_interrupt. Comment out GPIO_PinOutToggle().

OK, so let's discuss in this thread.

OK, so let's dissucc in this thread.