予期しないアイテムが出現する

Items that are not specified as loot in RaidableBases (a “transceiver”) are appearing.

It looks like a mobile phone, and when a player holds it and possibly performs some action (details unclear—this is based on another player’s report), a red error message shows in the top-left of the screen and an NPC normally found at Fishing Village or Bandit Camp (MissionProvider_test) spawns directly under the player. 

Don't know what item could cause that without a plugin interference, and not appearing in loot is odd, maybe grab a screenshot of the item + give it to yourself from F1 to check if it causes same behavior.