Copy and Paste attached Boundary event

All, I am working on one small project. I am able to copy and paste individual elements. But when we attach Boundary element to usertask, and try to copy only attached Boundry event I am getting blan object in tree.

I am using “bpmn-js”: “^3.5.0”,
Could you please help on this.

Thank you,

We introduced copy&paste support for boundaries with version 5.1.0, so you would have to upgrade it if possible.

Thank you so much for your reply .

Thank you,
Shivaji B