Live bindings for multiple exports do not update correctly on cjs.

Rollup Version

4.0.0

Operating System (or Browser)

Browser

Node Version (if applicable)

No response

Link To Reproduction

https://rollupjs.org/repl/?version=4.0.0&shareable=JTdCJTIyZXhhbXBsZSUyMiUzQW51bGwlMkMlMjJtb2R1bGVzJTIyJTNBJTVCJTdCJTIyY29kZSUyMiUzQSUyMmxldCUyMGElMjAlM0QlMjAzJTNCJTVDbmV4cG9ydCUyMCU3QmElMkMlMjBhJTIwYXMlMjBiJTdEJTVDbiU1Q25leHBvcnQlMjBmdW5jdGlvbiUyMHNldCgpJTIwJTdCJTVDbiUyMCUyMGElMjAlM0QlMjA0JTNCJTVDbiU3RCUyMiUyQyUyMmlzRW50cnklMjIlM0F0cnVlJTJDJTIybmFtZSUyMiUzQSUyMm1haW4uanMlMjIlN0QlNUQlMkMlMjJvcHRpb25zJTIyJTNBJTdCJTIyb3V0cHV0JTIyJTNBJTdCJTIyZm9ybWF0JTIyJTNBJTIyY2pzJTIyJTdEJTJDJTIydHJlZXNoYWtlJTIyJTNBdHJ1ZSU3RCU3RA==

Expected Behaviour

// input.js
let a = 3;
export {a, a as b}

export function set() {
  a = 4;
}


// output.cjs
'use strict';

exports.a = exports.b = 3;

function set() {
  exports.a = exports.b = 4;
}

exports.set = set;

Actual Behaviour

// input.js
let a = 3;
export {a, a as b}

export function set() {
  a = 4;
}

// output.cjs
'use strict';

exports.b = 3;

function set() {
  exports.b = 4;
}

exports.a = exports.b;
exports.set = set;

exports.a does not updated on a reassigned.

Start with the linked Rollup REPL reproduction and compare the shown input.js and output.cjs for the CommonJS output. Trace how the two exports of the same binding are generated, then verify that reassigning a updates both exports and that the output matches the expected behavior.