Rex Files (rx2) do not show up in search result

When i’m in “Import Audio File…” I can browse and preview rex files, but every time i use the search field, it won’t show any rx2 files in the result. It shows all other file formats in the results, just not .rx2 files.
This only happens on Cubase Pro 8. I have a bunch of earlier version (6, 6.6, 7.5) installed on the same computer and it works fine on the early ones.
I’m so used to searching my REX library that way that it’s really frustrating that it doesn’t work anymore. The files still show up in the Media Bay but it doesn’t respond as fast and it’s more cluttered.