To reproduce:
1 create one or more clips in Project window, e.g., MIDI
2 rename the clip(s), e.g., “verse” and “chorus”
3 select clip(s)
4 Edit | Functions | Duplicate to duplicate the clip(s) and add them to the end of the clip(s)
=> duplicated clips lose the clip names assigned in step #2, using track name instead
Cubase 9.0.20 Build 209 64-bit, Mac OS X 10.12.5
– jdm