Thanks for your reply, it's help me to think.
In the same theoretic subject, if I have a situation that in the last several sprints, Developer A burned significantly more points than any other team member.
One factor that can contribute to your observation is Story estimation.
Although the volume of work may be more than the others, they may be less complex than the others.
Some questions to check out: How does the team currently estimate stories?
As you are new to the team, you may need to engage with them to understand how they do certain things and why they do it that way.
Joy
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