Yes, you are correct about the manual stating this; there is nothing wrong with your glasses. All of our glasses record in a 3 minute interval in order to avoid large file sizes and to make it so that glasses can easily transfer files through wifi without errors or timing out.
We had created our instruction manual based off our prototype model, but our engineers limited the file length to 3 minutes without consulting us because they didn’t want to cause issues with the mobile app. We are going to continue to push our engineers to allow for longer intervals.