I had this problem on Cubase 8 and now on Cubase 9 which makes it unusable at all and I am forced to use the import audio option instead of the Media Bay which I really like to be able to use.
I scan folders in Local Disks and after the scanning when I go to a folder with audio samples nothing shows in the search results. I re-scan the folders and while scanning the files are all shown but after the scanning is done there is no samples yet again. I even cleaned the folders of all non wav files like aiff, reason files, etc.
Where lies the problem? How can I effectively use the Media Bay>