After the official release of Rec Royal, a bug has approached in the quest, ILS, where some flintlocks fail to work due to not reloading, even if they are at full ammo. I would have to search around the flintlock boxes and check for the working flintlock, but in the middle of action it's more or less of annoyance.
Sometimes I've been in situations where flintlocks will stick to your hand. I know it's happened in Rec royal too. I know I've had the situation sometimes before the update even.