Haven’t had this problem till today. Seem like other people have run into it to.
It only happens when I use both gh and player. As you can see in the video the ghosting did not show up till I opened gh.
So, in essence, it leaves behind all the gh things that happen.
Not only that but when I close the gh tab the previewed geometry from that tab is still left behind.
If you’re in Rhino 8, there is a toggle that you can uncheck to close the file after the GH Player command is run. See this thread (Loops while in compiled GH or Grasshopper Player - #3 by AndyPayne). Also, if you have the remote control panel open, you might try closing that.