TinyMCE image browser error when no acces to web context

It looks like the resource browser in the tinymce editor always send wctx web, like this : connectors/modx.config.js.php?action=browser&wctx=web.
This is a problem when you are using multiple context en limit users to just one context. If this context is not web You get an access denied, when I change the &wctx to the active context then it works.

Is this a bug or a setting that I missed?