I2S output works only for mp3 files

Hi everyone,
anybody knows why Mp3 files works fine thru I2S out but don’t work with WAV or FLAC on Raspberry Pi 3 and Volumio v2.118. Simple no sound at otput. Try with Generic I2S DAC selection in volumio settings? Any idea? Thanks.

Which I2S DAC?

It is not brand name DAC, it is home made DAC with SRC4192 upsampler and PCM1794A dac chip.

The same problem. Raspberry Pi 2 v1.1 + es9038 dac shows sampling rate 1441 kHz instead 44kHz. And resampler with 384kHz work at 192kHz