when i use fstorage to store data ,some error happen

[xuejiao.xiang]

chip: nrf52832

sdk:nRF5_SDK_15.3.0_59ac345

my purpose:  i want to store data to flash from ble_uart

demo:  examples\ble_peripheral\ble_app_uart   and examples\peripheral\flash_fstorage

 i  put flash_fstorage  demo write and read function into ble_app_uart   project.

it can not run as i expect

in fact ,the code is below

why this demo just write once?

[xuejiao.xiang]

i also tried fds mod,still have this problem.

if i create a project without ble stack,this will not happen