I have exported the FIT file from Garmin Connect Web & downloaded it directly by connecting the watch to my laptop. Either way, the FIT files are missing about 8 mins of data halfway through the activity (if it helps, I'm most interested in the heart rate data). However, I can view all the data without issue on the Garmin Connect Web as well as mobile app, which means the data has been recorded by the watch somehow, but it is not included inside the FIT file.
I would really appreciate if I can get some help on how to extract the missing data. Thank you so much!