IDK if there was a specific mod for it, but I remember in the past if multiple vehicles appeared at once I could just see them all show up at once in a drop-down menu. I've since cleared all my mods and since I'm playing with skin mods, it means any time a new vehicle unlocks I end up stuck with way too many pop-ups one after the other for the vehicles and it's annoying. But I don't want to turn them off because I actually need to see when they're available!

Was there aspecific mod or did an update to the game screw that up?