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In the hope that it's a software glitch try restarting your fitbit by pressing and holding the button for 10 seconds.
If that doesn't work then it's probably a hardware issue and your best option would be to contact customer support via contact.fitbit.com If they can't fix it they can check your warranty status and advise on your options.
Best Answeri tried restarting it by pressing the left button for 10 secs, but it's still the same. i hope the warranty will help, i bought it from Amazon April 2019.
Best Answer