PDF file not showing in Media Control

Hello,

I have developped a widget using a Media Control Manager. This control manager need to handle images files, videos and also PDF files. So, i set “media_types” settings to this:

So, this field is rendering like this:

That’s correct.

But, when we click on the button to upload file, only images and videos are shown:

But there is some PDF in the WP media gallery:

Am I doing it wrong or is it a bug? Thanks in advance.