There is a bug when you import several wav files in your project, even you clicked on convert files to the project format, the wav files stay in their original format and are not converted.
This bug appeared in Cubase 10.5 too and was fixed on Cubase 10.5.2 I guess.
Please could you fix that bug on Nuendo too?
Sadly, I’ve found that most of the bugs from Cubase 10.5 have found their way into Nuendo 10.3. I’m only one “voice crying out in the wilderness”, but I’ve pleaded for Steinberg to please not let this happen when transitioning from Nuendo 10.2.20 into either Nuendo 11 or in this case 10.3.