AVI rendering (x264 externel codec) out of sync video/audio

[AMD Ryzen 7 5200HX 2.9GHz]

when I render AVI video with h264 codec that I downloaded from codecguide
website (that also helps playback video) my output file have a both video and audio
sync problems. Audio comes from behind within 3 second delay, in movie studio
preview runs fine, issue starts after the file rendered.

Anyone knows why? Audio/video settings are completely same, audio Hz
frame rate all same, I'm rendering my content within same settings as it recorded

Anyone having the same issue? note that x264 codec appears in movie studio
only if you downloaded the codec from internet, I do not use sony yuv because
its so slow rendering and costs too much space.

help needed