Instrument Track midi parts copy issue with VE Pro

Cubase10 on master computer.
VE Pro6 on slave.

Copying midi parts by dragging all relevant parts makes both computers are stuck, waiting for sort of ‘loading’ process in VE Pro. When this weird loading thing is done (like when saving a project), back to work…

This occures when:

  • drag/select includes folders including themselves (even empty) Instrument Tracks.
  • drag/select includes midi parts located on an Instrument Track.

It works ok when :

  • selecting midi parts other than Instrument Tracks ones.
  • using ‘Edit/Select in loop’ feature (albeit the same parts are selected than when dragging).

Anyone experienced this? Thank you!