The same wav file decodes different files in different CPU architectures

I follow this example：
I change parameters：--cpu=armeabi-v7a or --cpu=arm64-v8a, to generate programs with different CPU architectures.

use **--cpu=armeabi-v7a**,The MD5 value of decoded file：
alioth:/data/local/tmp$ md5sum 16khz_sample_000001_decoded.wav
b4b6f9cff4c62615f23b3147133487cc 16khz_sample_000001_decoded.wav

**The MD5 value of decoded file is b4b6f9cff4c62615f23b3147133487cc**

use --cpu=arm64-v8a,The MD5 value of decoded file：
alioth:/data/local/tmp$ md5sum 16khz_sample_000001_decoded.wav
bf9981f4e88f4b4f1c4d9859a02f0d7f 16khz_sample_000001_decoded.wav

**The MD5 value of decoded file is bf9981f4e88f4b4f1c4d9859a02f0d7f**

the original wav file is same,but decoded file is different.
**Is this normal ?**

my phone cpu info：
alioth:/data/local/tmp $ cat /proc/cpuinfo
Processor : AArch64 Processor rev 0 (aarch64)
processor : 0
BogoMIPS : 38.40
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer : 0x51
CPU architecture: 8
CPU variant : 0xd
CPU part : 0x805
CPU revision : 14

processor : 1
BogoMIPS : 38.40
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer : 0x51
CPU architecture: 8
CPU variant : 0xd
CPU part : 0x805
CPU revision : 14

processor : 2
BogoMIPS : 38.40
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer : 0x51
CPU architecture: 8
CPU variant : 0xd
CPU part : 0x805
CPU revision : 14

processor : 3
BogoMIPS : 38.40
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer : 0x51
CPU architecture: 8
CPU variant : 0xd
CPU part : 0x805
CPU revision : 14

processor : 4
BogoMIPS : 38.40
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x1
CPU part : 0xd0d
CPU revision : 0

processor : 5
BogoMIPS : 38.40
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x1
CPU part : 0xd0d
CPU revision : 0

processor : 6
BogoMIPS : 38.40
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x1
CPU part : 0xd0d
CPU revision : 0

processor : 7
BogoMIPS : 38.40
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x1
CPU part : 0xd0d
CPU revision : 0

Hardware : Qualcomm Technologies, Inc SM8250

alioth:/data/local/tmp $ getprop ro.build.version.release
12
alioth:/data/local/tmp $ getprop ro.build.version.sdk
31
alioth:/data/local/tmp $