Media interface functions in Upfront are unreliable

I am very disappointed with the media interface. Here are some examples:

Opening the media interface the first time to pick images for importing into i.e. a gallery
- page selector does not display (20 images per page, more than 300 images available)
- click on image shows no feedback/mark for selected image
- selection on 'Filter Media by' shows no change or result in left pane

Closing and re-opening the media interface
- page selector is visible and shows no result when clicked on left or right arrow
- no change of drop-down content when 'Filter Media by' is clicked
- after an image is selected there is no additional selection to pick the proper image size