Links are broken when the group moves

Links are broken when the group moves…

what would be the reason ?

That is not inherently a problem: https://gojs.net/latest/samples/grouping.html
But I can imagine that something could cause that behavior.

What is your Group template? In particular, what are your Group.layout and Diagram.layout? Have you customized the DraggingTool at all?

I made these values ​​true. That’s why the problem