At some point everything that was not already at T5 medal level got reset for me, all of it for some reason. Anything that was T5 or higher kept the correct numbers. And this happened on Xbox Series X, yet I don't get complete vehicle setting resets every time I switch form AOW to Portal modes, so that is good news and worth the loss of leveling vehicles, guns, gadgets, characters, and etc...
I'm guessing Dice had to make such gigantic changes due to near tech bankruptcy at launch, some things simply got reset forever under certain circumstances on some platforms...and I'm fine with that, as long as the improvements are worth the loss...