Agree with Guitarno. Also raised ticket I the past but while I was never 100% convinced it was just the acoustic sound of the string I struggled to prove anything different. In quieter rehearsals other band members could hear the ghost notes so I got a long lead and played outside and the ghosting disappeared for them. And when I've played live no one else has heard the ghosting. So while it surprises me I can still hear it myself at reasonable volume I guess the acoustic sound is the most likely answer. A bit of a long shot but I also wonder if as the player you are more 'tuned' into the ghost note if you can feel the vibration of the actual string through the neck too. Unlikely but...!!