World wrld_0e017a10-3469-4c65-9fec-27a877d8fd4a
Repro steps: Have two players join. Click the unicorn to get balloons, observe the colors (look at the logs to see the broadcasts). Pop each other's balloons, everyone should see them pop and disappear, and then reappear after clicking the unicorn.
Have one player rejoin the instance. Now if the rejoiner clicks the unicorn, the first player will see a NullReference and the balloon will remain pink instead of being set to a random color. If that balloon is popped, it will not disappear on one client, and there will be a Null Reference.
Probably related to this canny: