Some time ago, I added the names of my family members to the Queue. Among others, the nickname of my sons (for the older: 亮亮). The definition I gave was "Julian (Spitzname)" where "Spitzname" is the German for nickname.
Now it popped up again with "Julian Spitz(personal name)" - so somebody touched the definition. That surprised me - I thought the stuff I add to the Queue stays "personal". If vocab is shared, that might be a problem, as I now of some quality issues with items I entered (e.g. I mixed up definitions once).