Inserting link uses 1st option in the language list, not the original language

Hi, I might be running into a bug, or I’m not entirely understanding something.

I’m using the business version of TranslatePress.

The site is originally in Dutch.

Force language in custom links is on.

Use a subdirectory for the default language is on.

English is dragged to the top of the “All Languages” list, so international visitors land on the English translation.

When writing a new custom post, in the original Dutch,
I am adding an internal link to the paragraph.
Using the standard “Insert/edit link” WordPress menu, I type part of the post I want to link to, in the original Dutch language, upon which WordPress shows the Dutch post in the dynamic list.
Clicking that Dutch title post however inserts an English (translated slug) link, without the /en/ subdirectory in the url.
This is not the desired behaviour, as the link will now link to the English post from a Dutch page.

When I drag Dutch to the top of the “All languages” list in the TranslatePress settings, I can insert Dutch links (also without /nl/ subdirectory, but they work).
Disabling the “Force language in custom links” does not make a difference, it will still insert English slug links, without subdirectory /en/, into Dutch posts.
Is this a bug? I think it should default to inserting the original language link when writing a new post.