Higher current consumption after nrfx_i2s_uninit

Hi,

I'm working on audio codec(ES8374) which using I2S to transfer data, and this part is fine. 

Since project require low power consumption, All peripheral should be closed after usage right? but when i use nrfx_i2s_uninit, It just make power consumption a lot higher(about 5mA). 

After some test, I find if nrfx_i2s_start never used, nrfx_i2s_uninit seems no issue at all.

How do i fix it?

About project:

SDK: nRF5_SDK_15.3.0_59ac345

SoftDevices: S132

IDEs: gcc-arm-none-eabi-7-2018-q2-update