When you have no weapons (i.e. no primary, secondary or launcher/laser designatior), when you reload a save, if you have any throwable items (i.e. frag grenades, chem lights, smoke grenades), they will appear in your weapon slot and more importantly, if you use the currentWeapon(unit) function, it will return the value of the throwable item.
When reloading a save, the throwables should not be equipped as weapons, but equipped as throwables.
Place Unit with at least one weapon and at least one throwable in the editor
Run map
Drop all weapons (dont drop throwables)
Save game
Load aforementioned save
The throwable item will now be your current weapon
If this is an intended feature, it is annoying when trying to validate player has no weapon for stealth scripts. Perhaps adding a validator to check weapon is not a throwable script might remedy this problem if it is an intended feature.
Probably both category Inventory and Savegame/Loadgame, but I'll opt for the latter in this case.