Audio of the last frame of the composition won't render in After effects

Hi 

I am currently having the issue where After effects won't render the audio at the last frame with mp4 codec even tho it does render audio with mov codec.

The bottom brown layer is the composition and the top blue one is the one I exported via Media Encoder and you can see that the audio is missing at the end.

Any kinds of help or advice or suggestion would be appreciated.

Thank you