Can anyone else confirm it? Or is it my installation? I've tried all the usual suspects before. Formula Pro 1.21. No mods over it. Every click on another Formula Pro skin causes the number of empty customization options grow by 2. And when I click on some other car afterwards I get those empty options as well.
Latest one. I've found the issue. I had an obsolete UpgradeList: entry in all_vehicles.ini for FPro after some mod I made some time ago. This was the culprit. The fact that rF2 reacts to such an entry in this way though seems like a bug anyway.