Recode to MP4 with handbrake causes audio "delay relative to video: 67ms"

[dave in or]

I have been converting some videos to MP4 with handbrake. When I check the files with mediainfo I get this in the audio section: "delay relative to video: 67ms." This is happening with a bunch of files that have nothing to do with each other yet they all have that same delay of 67ms. When I code to MKV this does not happen. The reason I chose MP4 for these files is that they have AAC audio and I use the AAC passthru option so the audio is unaltered. Is this something that could be fixed by demuxing and remuxing the MP4 files? I find it strange that the delay is always 67ms.

Any ideas on why this is happening and how to fix it?

[dave in or]

Sorry for the double post, I'm a bit unaware of etiquette.

"do I notice any sync issues?"

It's hard to say for sure. It does feel like it is barely noticeable. I am curious if there is technically a delay whether I notice it or not. I will say that when I play piano through the computer, a 50ms latency is very noticeable and makes it difficult to play.