JS aggregation breaks language file loading for locally-stored libraries

When JavaScript aggregation is enabled on a site using a locally-hosted library its language files (and probably some other files) can't be loaded from the library. The main timeline.js script gets aggregated too. When it initializes, it sets its location to the site's files directory where the aggregated file is cached and tries to dynamically load other library files from that same directory. Of course, they aren't located there.

Proposed Solution

TimelineJS has a setting for specifying the location of the library files. I didn't previously know what this setting was made for, but it seems to have been created for this exact situation. The plugin should automatically set this value whenever the library files are served locally.

Original Report

After enabling language NL on my site, i noticed that my already working timeline was showing an error
Could not load language ["nl"]: Not Found

I found out this message originates from sites\all\libraries\TimelineJS3\source\js\language\TL.Language.js
where some ajax call is performed in case language differs from 'en', and returns a response > 200.

In an effort to debug this piece of JS, i had to first disable my Advanced Aggregation setting (provided by https://www.drupal.org/project/advagg).
This action seemed to solve the occurring error.
After some tweaking i found out the error was caused by the enabled "Fix improperly set type" in the AdvAgg JS settings

I'm not an aggregation specialist and the symptoms it may cause, but i thought it might be useful sharing this information.