Mismatch bewteen model shape and convex shape with deformable body

As u can see, I make strawberry stem as deformable body while cube and strawberry fruit as rigid body, and make them attached. However, I found the stem shape and its convex is mismatched. How can i solve this mismatchment?

Isaac Sim Version

4.0.0

Operating System

Ubuntu 22.04

GPU Information

  • Model: rtx 3090

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yes, absolutely! As u can see, the stem model seem to be in straight line shape ,however the convex shape tend to be in curved shape