relative imports in .js are not loaded

[steph-nb]

Expected behavior

The page https://www.kunsthoch-luzern.ch/ (recorded with Heritrix) should be visible

What actually happened

The page https://www.kunsthoch-luzern.ch/ (recorded with Heritrix) stays completely white in the replay with pywb 2.7.4
Whereas the same crawl can be replayed with openwayback...

##Assumed cause
Imports in js using relative paths are not getting requested/loaded:

The page uses this js:
https://www.kunsthoch-luzern.ch/ressources/js/main.js

which imports these .js:

import {NullSwiper as e} from "./mods/nullswiper.js";
import {ViewportFix as t} from "./helpers/viewportFix.js";
import {ClientInformations as o} from "./helpers/clientInformations.js";
import {EventHandler as r} from "./helpers/eventHandler.js";
import {Simplify as a} from "./helpers/simplify.js";
import {AddNullInteract as n} from "./helpers/nullInteract.js";
import {menuHandler as i} from "./static/menuHandler.js";
import {SubMenu as s} from "./static/submenu.js";
import {Cookie as l} from "./static/cookie.js";
import {Cursor as c} from "./static/cursor.js";
import {MapHandler as m} from "./dynamic/map.js";

With the rewritten form served by pywb which looks like this:

var WB$wombat$assign$function = function(name) {
return (self._wb_wombat && self._wb_wombat.local_init && self._wb_wombat.local_init(name)) || self[name];
};
if (!self.__WB_pmw) {
self.__WB_pmw = function(obj) {
this.__WB_source = obj;
return this;
}
}
{
let window = WB$wombat$assign$function("window");
let self = WB$wombat$assign$function("self");
let document = WB$wombat$assign$function("document");
let location = WB$wombat$assign$function("location");
let top = WB$wombat$assign$function("top");
let parent = WB$wombat$assign$function("parent");
let frames = WB$wombat$assign$function("frames");
let opener = WB$wombat$assign$function("opener");
let arguments;

{
    import {NullSwiper as e} from "./mods/nullswiper.js";
    import {ViewportFix as t} from "./helpers/viewportFix.js";
    import {ClientInformations as o} from "./helpers/clientInformations.js";
    import {EventHandler as r} from "./helpers/eventHandler.js";
    import {Simplify as a} from "./helpers/simplify.js";
    import {AddNullInteract as n} from "./helpers/nullInteract.js";
    import {menuHandler as i} from "./static/menuHandler.js";
    import {SubMenu as s} from "./static/submenu.js";
    import {Cookie as l} from "./static/cookie.js";
    import {Cursor as c} from "./static/cursor.js";
    import {MapHandler as m} from "./dynamic/map.js";
    const u = {
        viewportFix: new t,

...

These js-files are not requested by the browser.

Browser and pywb

• pywb 2.7.4
• OS: Windows 11
• Browser : Chrome
• Version : 111.0.5563.111