Vehicle REQ glitch?

I noticed this since the game first launched but never really thought anything of it, first few days playing Halo 5 I got my hands on a mantis, but when I went to spawn it in warzone it didn’t even appear? Same thing now is happening with the Gauss Hog, I got the certification for it but when I look for it in the REQ station under warthogs it’s not even there. This happen to anyone else?

Interesting. Working well for me. Only items that I have in inventory show up.