They surely don't, provided you use the product correctly.
But you posted a video instead of a problem description of the problem (no need to post a video to "prove" it happens to you, we believe you), what we need a proper description of your situation, so now I can only GUESS all possible causes:
- First and most obvious: have you Enabled Seated Passengers on the Fenix in the GSX Config page ? It's an OPT-IN option, is not on by default, for the obvious reason it will need to modify the airplane file, and we don't modify the airplane files without your explicit permission.
- If you are sure they are enabled, what is your view ? If you are in a VC View, Seated Passengers will only be visible if the Cockpit Door is open. They always show if you are in External or Showcase view.
- Are you using an unofficial livery ? If yes (assuming you use GSX 3.0.5, current version as of today), is the livery coming in a package with a name starting with fnx-aircraft-320_somelivery or FNX_320_somelivery ? If yes, those should be recognized by the installer, if the package has another name, you must rename it to conform to either standard.
- Assuming the name of the livery package is correct, have you installed it AFTER you enabled Seated Passengers in GSX ? If yes, you should follow what the manual says at Page 10, the paragraph named Adding New Livery, which explains you must return to the GSX Config Page in the installer each time you add a new Livery.
- Are you using Auto FPS ? If yes, you must be sure the OLOD level never goes below 100, or 200 if you are in VR.
