Media Encoder render always stuck at 100%

Hi,

I exported animation video from After Effects by using Media Encoder. Somehow, it always stuck at 100% (always stop at remaining 00:00:02). It's not even a big file, estimated is just 258MB (and it often happen, not only to this file). Usually i just tried to stop the render, and re-render, it render successfully for the second time without stuck. But today I have re-rendered 5 times, it always stuck at 100%. The render was completely fine if i render shorter length video.

I rendered with H.264 format with Match Source - High bitrate preset.

Is there a solution to this? Or at least is there a way to stop the render without losing the mp4 file? 

Thank you for your time!