The Secureworld doesn't show the loss

[Xxxgrey]

Hello,I just followed the README to train a model.
The normal world seems right.

# Prepare session with the TA
# Begin darknet
# mnist_lenet
# 1
layer     filters    size              input                output
    0 conv      6  5 x 5 / 1    28 x  28 x   3   ->    28 x  28 x   6  0.001 BFLOPs
    1 max          2 x 2 / 2    28 x  28 x   6   ->    14 x  14 x   6
    2 conv      6  5 x 5 / 1    14 x  14 x   6   ->    14 x  14 x   6  0.000 BFLOPs
    3 max          2 x 2 / 2    14 x  14 x   6   ->     7 x   7 x   6
    4 connected_TA                          294  ->   120
    5 dropout_TA    p = 0.80                120  ->   120
    6 connected_TA                          120  ->    84
    7 dropout_TA    p = 0.80                 84  ->    84
    8 connected_TA                           84  ->    10
    9 softmax_TA                                       10
   10 cost_TA                                          10
# Learning Rate: 0.01, Momentum: 0.9, Decay: 5e-05
# 1000
# 28 28
# Loaded: 0.197170 seconds
# 1, 0.050: 0.000000, 0.000000 avg, 0.009999 rate, 3.669898 seconds, 50 images
# Loaded: 0.000447 seconds
# 2, 0.100: 0.000000, 0.000000 avg, 0.009998 rate, 3.651714 seconds, 100 images
...

but the secureworld seems not work

D/TC:? 0 tee_ta_init_pseudo_ta_session:280 Lookup pseudo TA 7fc5c039-0542-4ee1-80af-b4eab2f1998d
D/TC:? 0 load_ldelf:704 ldelf load address 0x40006000
D/LD:  ldelf:134 Loading TA 7fc5c039-0542-4ee1-80af-b4eab2f1998d
D/TC:? 0 tee_ta_init_session_with_context:573 Re-open TA 3a2f8978-5dc0-11e8-9c2d-fa7ae01bbebc
D/TC:? 0 system_open_ta_binary:250 Lookup user TA ELF 7fc5c039-0542-4ee1-80af-b4eab2f1998d (Secure Storage TA)
D/TC:? 0 system_open_ta_binary:253 res=0xffff0008
D/TC:? 0 system_open_ta_binary:250 Lookup user TA ELF 7fc5c039-0542-4ee1-80af-b4eab2f1998d (REE)
D/TC:? 0 system_open_ta_binary:253 res=0x0
D/LD:  ldelf:169 ELF (7fc5c039-0542-4ee1-80af-b4eab2f1998d) at 0x4001a000
D/TC:? 0 tee_ta_close_session:499 csess 0xe178320 id 1
D/TC:? 0 tee_ta_close_session:518 Destroy session

but all the test and hello world works. I just dont know why