After 'app stop', cannot found 'wlan0'

After stop app board cannot found “Wlan0” and cannot connect to wifi after using command to wlan0 up.(using wp7605)

this is what I have got from dmesg after reconnect wifi.
wifi_reipset2.txt (542.9 KB)
dmsg.txt (26.8 KB)

which application have you stopped?
Why do you need to stop this app?

it was the app that I have write and didn’t stop but the second time still error.

do you have the console log?
Not quite understand what command have you entered