Recently, I’ve been updating this one place with the camera focused on a title that I can re-position should I want to.
However, as of yesterday instead of using this as the thumbnail, it’s been focusing on an area looking down from the center of the baseplate. 
Any way to fix this at all?
Edit: It shows the proper image on the game icon, but not the thumbnail.
I ran into this the other day with my Mystery Shack. Re-publishing (and maybe slightly changing the camera position) fixed it.
It happens when you press Alt+P to publish. If you use the Publish as… button, it works just fine as far as I can tell
I’ve been using the old fashioned "Exit studio save/upload prompt"though, so it’s not this.
Edit: Unless it is. I don’t know. I’ll try that.
It’s because you have either multiple cameras, or the one used has wrong settings.
You can also try setting the CameraType to Fixed.
(I remember thumbnails not working properly because of the wrong CameraType)
Either way, shouldn’t you be using a Game Icon?
If you’re doing it that way so you can put images like NEW or UPDATED, etc, then that’s not in the spirit of the Icon update.
On topic of the game but not of the post:
You should add some slight screen shake when the train hits it’s climax for extra immersion.
The game icon works fine. It’s the thumbnail that’s acting up.
Thumbnails cost money. Screenshots of your place are free.
