Fixed group initialPosition

If you want to figure that out, you’ll need to set trace points in your React code, or in our React component, to see what is happening that is different from a normal app.

Are you using the latest versions of the software, in particular of the gojs-react component?

Have you defined some sort of hover behavior?

Are you using the latest versions of the software, in particular of the gojs-react component?

yes, and there is no behaviour for hover

found the issue,
we use go.Spot.Center as locationSpot and computeIncludingLocation accepts only the go.Spot.TopLeft as the locationSpot

It works with any spot, but for your purposes you want to use Spot.TopLeft, the default spot.

So, is everything good?