Dear SubashMano,
Welcome to the club. Actually, there are tons of users claiming for the same behavior; in my opinion (as stated by others), there is a design "problem" with the device and fitbit will never acknowledge it. Moreover, they are trying to solve the problem offering a 25% discount, which seems ridiculous for a U$ 250-300 device.
So, the best option is "move to another brande (a solid one)".
Regards,
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