Strange problem on aes128 module

I am working on project DA14580_DIALOG_BEACONS_3.40.2, and I need do some encryption work when necessary. The aes128 module is working well, but I found a strange problem yesterday. I do some operations as follows.

I'm using the extended sleep mode.

First I send gapm_use_enc_block_cmd in app_adv_func():

void app_adv_func(struct gapm_start_advertise_cmd *cmd)
{
// Advertising Data

// Scan Response Data

app_env.enc_in_use = true;//encryption moudule busy

//send encryption command
struct gapm_use_enc_block_cmd *cmd = KE_MSG_ALLOC(GAPM_USE_ENC_BLOCK_CMD,
TASK_GAPM, TASK_APP,
gapm_use_enc_block_cmd);
cmd->operation = GAPM_USE_ENC_BLOCK;
memcpy (cmd - > operand_1 app_env。关键,16);
memcpy(cmd->operand_2, app_env.plaintext, 16);

// Send the message
ke_msg_send(cmd);

}

Second I do some printing and set one flag to indicate the encryption is completed.

int gapm_use_enc_block_ind_handler(ke_msg_id_t msgid,
struct gapm_use_enc_block_ind *param,
ke_task_id_t dest_id,
ke_task_id_t src_id)
{
arch_printf("data encryption cpl\r\n");

app_env.enc_in_use = false;//the flag is used to indicate that encryption moudule is idle now

app_adv_stop();//encryption complete, stop advertising to update data

return (KE_MSG_CONSUMED);
}

Finally I check the app_env.enc_in_use flag and wait for encryption module idle, then send another encryption cmd

void app_set_dev_config_complete_func(void)
{
ke_state_set(TASK_APP, APP_CONNECTABLE);

app_adv_start();

while(app_env.enc_in_use);//check flag and wait for encryption moudule idle

app_env.enc_in_use = true;//encryption moudule busy

//send encryption command
struct gapm_use_enc_block_cmd *cmd = KE_MSG_ALLOC(GAPM_USE_ENC_BLOCK_CMD,
TASK_GAPM, TASK_APP,
gapm_use_enc_block_cmd);
cmd->operation = GAPM_USE_ENC_BLOCK;
memcpy (cmd - > operand_1 app_env。关键,16);
memcpy(cmd->operand_2, app_env.plaintext, 16);

// Send the message
ke_msg_send(cmd);
}

The result is encryption module won't work and the code is executing while(app_env.enc_in_use); all the time. At the same time, of course, print nothing.

But after I comment the line while(app_env.enc_in_use); in void app_set_dev_config_complete_func(void), the encrytion module works well and print "data encryption cpl" successfully.

一个s you can see, I need to do two encryption operations after some initialization procedure.