Hey @Lilicogas, let me give you a warm welcome to the Community! Is this happening right after the beginning of an exercise? In the meantime, I recommend experimenting with how high you place the tracker on your wrist. When you're not exercising, wearing the tracker just above the wrist bone, typically works fine. However, moving the tracker up a couple inches can be helpful during high-intensity exercises or exercises that cause you to bend your wrist frequently. If you haven't already done so, please review our recommendations for wear and other tips at this post.
If you're wearing the tracker correctly, try changing the setting (either Auto to On or On to Auto). In addition, you can find restart instructions at this other post.
Let me know if the accuracy gets better.
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