Instinct 2x
The watch system version is 16.11. I am a Chinese user. I found that last night my sleep data, heart rate, etc. were empty. Then today I found that when I detected the heart rate, the optical element behind the watch did not light up, so the heart rate was not detected. Then I restarted the watch, and the fonts, apps, dials, etc. on the watch disappeared, but it could still synchronize with the mobile APP normally. I connected it to my computer and used Garmin Express to prompt me to update. After the update, I set the language to English. After setting it to Chinese, it will be normal.
So, I'd like to know what might be causing this problem so I can prevent it from happening again
