Later issue switches had a small plastic piece to inhibit the problem.
![](https://hosting.photobucket.com/albums/w141/mikedian/Track/Atlas%20O%20track/6924%20Relay%20board/.highres/IMG_8257.jpg?width=1920&height=1080&fit=bounds)
They said wheels, not pickup rollers.
I have not noticed any issue with wheels dropping on any of my Atlas turnouts. But even with these plastic fillers I still have issues with pickup rollers falling off of some turnouts and getting stuck. I'll be 3D printing new fillers to stop that.