It appears to be affecting both Lap and Realize bands. While surgical misplacement can create massive issues, even correctly placed bands can result in problems, whether or not they slip.
In my case, I ended up changing surgeons midstream for the revision in part because, despite classical symptoms, one surgeon insisted I did not have a band slip on the basis of a Upper GI she had done NPO. If it's done NPO, you generally won't see the slip because there is nothing to demonstrate.
In my case, my body tried to reject the band and couldn't physically dislodge it from my body. So it started enveloping it in scar tissue. Including the inner donut portion. My band was literally choking me slowly to death, despite being emptied. I can't say exactly when but my band also slipped.
Like I said, I changed surgeon midstream during the revision process and switched to another surgeon who listened to what I had to say, had a competent staff and adjusted his fees for the self-pay portion of the process (my insurance paid for the band removal but not the sleeve). What I ended up paying for the sleeve itself amounted to about what I would have to pay out of pocket anyway.
BTW, during the removal process, my port ended up being the worst due to surgical mesh. Also covered in scar tissue.
The scar tissue throughout my digestive system was so bad that, even if the sleeve hadn't been scheduled, it would have had to been done anyway.
I'm not trying to scare you and I hope I'm not telling you more than you intended. But you asked a question. I'm giving you an answer.
I also hope, since you have had surgery, that you never develop problems.