Subject of the issue

dd-touch.js imports Utils via:

import { Utils } from './gridstack';

This creates a circular dependency warning when bundling (in my case with rollup.js).

The other dd-*.js files import Utils via:

import { Utils } from './utils';

Simply changing the import statement in dd-touch.js to match the other files resolves the problem.

Your environment

gridstack.js 11.4.0