This is going on since a year or so.. I don't know how this is still occurring and/or developer team hasn't already fixed it. I will post this hoping devs will realise someday that their game basic scripting-related issues.
Loadout resets randomly, the feature "save loadout" does not work properly. This occurs really often when changing game mode, example: from co-op to versus mode. But also in the same game-mode as well.
Even having more than one presets, it messed up with standard loadout and results in resetting or changing it completely. This is very annoying since the player must reset the loadout from the beginning.
I (and the community as well) really hope this to be fixed ASAP.