There is an issue in Umbraco 8.4, which is : when you upload images by MediaPicker, the images don't get selected automatically, you need to select them by your self.

Further details: 6844 and there was a fix for that 6995 but it hasn't been merged yet.

So I took the code that solves the issue into my project in this file umbraco.controllers.js and works 100% in normal media pickers, but when I try the media picker in RTE, yes it does the auto selection for the uploaded images, but the uploaded image doesn't get rendered in the RTE.

would be appreciated if anyone one could help in this