here another bug since 10.5 :
1 Click on Import audio file File->Import->audio file or Just drag Wav file In your project
2 Choose several Wav files in your browser which doesn’t have the same format (frequency and/or bit depth)
3 Check the boxes : - Copy into project directory - Convert frequency and - convert bit resolution
4 Now that the wav files are in your project go to your library and check the frequency and bit depth of the wav files that you just imported.
5 You can see that these wav files are not converted to the project format
Please hurry up to make it this function working again, thank you