Reproduction link or steps

https://stackblitz.com/edit/github-apupsbr3?file=dist%2Findex.umd.js

What is expected?

the example have two files. index.ts export other files. I'm use the Quill constants variable in test.ts, and Test class have a argument quill.
When I build code to umd I got this:

(function(global, factory) {
 // ...
})(this, function(exports, quill) {
// ...
quill = __toESM(quill);

//#region src/test.ts
	var Test = class {
		constructor(quill) {
			this.quill = quill;
			console.log(quill.default.events);
		}
	};
/...

The quill.default.events shuold be Quill.events. and this makes my code to error.

I tried version 0.19.0 and everything worked fine.

What is actually happening?

Duplicate variable names cause errors

Any additional comments?

If I export the content of test.ts directly in index.ts, the result is correct.