Media Browser Context Settings issue in ContentBlocks Input Type Repeater

I am a little blocked in a situation.
I am using ContentBlocks together with the Redactor on my website, and I have multiple contexts.
Each context is assigned specific media sources, both in Redactor and in ContentBlocks.
At first glance, everything seems to work.
However, I added an input type repeater with the attached properties. The text field is a rich text field inside my repeater, but when using the media browser, it opens according to the default settings, not the current context settings.
What am I doing wrong?
I hope the question makes sense…