[REG 5.13.2 -> 5.14] ECMAScript module import fails when importing multiple named exports or aliasing named exports

When mjs files contain multiple named imports like

import {retrieve, defaults, extend, each} from '/lib/src/core/util.mjs';

or named imports with alias like

import {applyTransform as v2ApplyTransform} from '/lib/src/core/vector.mjs';

or combinations like

import {
   getLayoutRect,
   box as layoutBox,
   positionElement
} from '../../util/layout.mjs';

compilation fails with "Error compiling js file" and "error: Expected token `,'".

Compilation worked fine with 5.13.2 - we didn't change a single mjs file.