Normally a send device with its original displayname will be displayed something like “#S>S01” in the mixer view. This should be true whenever a send is named exactly “#Send”.
renoise.song().tracks[].devices[].display_name = renoise.song().tracks[].devices[].display_name
This example will make this behavior stop.
(I’m nitpicking because I’m making a tool renaming dsps to default et c.)
EDIT: Leaving the name blank will fix it. Still, it could be fixed since it would be more consistent, for example not having to do special things in a loop in lua when hitting a send device. Basically, to rename all dsps to default names you’d have to set up a special list in your tool stating the native tools.