There are some cases there the easy themes assets are not properly injected. This is caused by the "loadLanguageFile" hack. If a language file is loaded before the user got authenticated then the assets loading would fail.
I don't see any reasons to use the loadLanguageFile hack at all. Adding it to the constructor work as well (it's triggered by the loadDataContainer hook first).
There are some cases there the easy themes assets are not properly injected. This is caused by the "loadLanguageFile" hack. If a language file is loaded before the user got authenticated then the assets loading would fail.
A language file can be loaded before authenticated when a model find method is triggered before (e.g. in a initializeSystem hook). See Https://github.com/contao/core/commit/fa81a2cdde6a96100ab008b128d55f20a164027e.
I don't see any reasons to use the
loadLanguageFilehack at all. Adding it to the constructor work as well (it's triggered by theloadDataContainerhook first).