Audio out sync when convert MP4

[ericXtam]

Trying to convert video to MP4 format but encountered audio out sync issue .However , if convert to MKV , it is normal.
If I convert the source to MKV then to MP4 again , the audio track is normal as well.
Here attached the log for your reference.

[Mona]

We need this source 殺神John Wick (1080p HD).mp4 to help check the problem, please send it to our FTP (Info is sending to you via PM), thank you.

[ericXtam]

File has been uploaded , please check

[Mona]

We will download it as soon as possible.

[ericXtam]

Any update regarding to this issue ?

[Mona]

Any update regarding to this issue ?

We've tested on different computers with different OS (Windows 7 and Windows 10), the output file is good to play, we could not reproduce the sync issue.