In particular (to name a couple), 1st generation battle rifles, the Fury grenade launcher for vehicles, and the skyguard on the lightning all fail to save correctly in their loadout slot when you logout and come back in.
I'm sure there are others but those are the main ones I'm experiencing right now. The skyguard hasn't saved to a loadout slot for years on my account. I've been dealing with it for a long time, but I've finally gotten tired of it.
Any chance Daybreak can shed light on this, please?