mwifi_write keep getting MDF_ERR_MWIFI_TIMEOUT

[teckhaokoh]

W (2665878) [mwifi, 778]: <MDF_ERR_TIMEOUT> Node failed to send packets, data_flag: 0x32, dest_mac: 30:ae:a4:5a:6d:bd

Keep getting the timeout message as above when sending data to parent node.
It's able to send at the beginning, then get into this timeout after some time, and will never get back to normal even if I resend every 5 seconds.
Any idea?

[ESP_Bond]

1. Is your parent node receiving mwifi_read or mwifi_root_read?
2. You can parameter `mwifi_example` to see what is the difference.
3. Can you provide your code? How can I reproduce it?