RAK7204 send fail when it's wakeup automatic

Hi Supporter:
My RAK7204 send data success when power up,But when it enter sleep, and wakeup in 600s ,The data send fail always. lora_pkt_fwd cannot recive anything.
Have anybody know this issue?

Thanks for any help.

send fail error code: ERROR: 96
lora status:
OK Work Mode: LoRaWAN
Region: AU915
Send_interval: 600s
Auto send status: true
Send_interval work at sleep
MulticastEnable: false
DutycycleEnable: false
Send_repeat_cnt: 0
Join_mode: OTAA
DevEui: AC1F09FFFE0133B9
AppEui: AC1F09FFF9157204
AppKey: AC1F09FFFE0133B9AC1F09FFF9157204
Class: A
Joined Network:true
IsConfirm: confirm
AdrEnable: true
EnableRepeaterSupport: false
RX2_CHANNEL_FREQUENCY: 923300000, RX2_CHANNEL_DR:8
RX_WINDOW_DURATION: 3000ms
RECEIVE_DELAY_1: 1000ms
RECEIVE_DELAY_2: 2000ms
JOIN_ACCEPT_DELAY_1: 5000ms
JOIN_ACCEPT_DELAY_2: 6000ms
Current Datarate: 0
Primeval Datarate: 5
ChannelsTxPower: 3
UpLinkCounter: 2
DownLinkCounter: 0