One R 360 mod - audio lag

Hello, I'm looking for some feedback from more experienced 360 camera users.

I was shooting a video on my 360 mod recently and the output audio is at least one second behind the image. I was shooting the default 5.7K 2:1 with no additional setting changes. I was using the micro SD card that came with the camera unit (I got a kit).

It was a cold day, around - 5°C. I cannot understand why this was happening. Any ideas? Unfortunately cannot share the output as there's a young child it in, and I do not have the parents' permission to post.

Thank you for any ideas.

Agnieszka