here is the case, at first i make my laptop to be in standby condition, then i go for lunch, when i get back and login to the windows, and reconnect the spark, i found that there are same users both at offline and online group, like this: (wish i can show you all the picture)
i’‘m using the wildfire 3_1_! and spark 2_4_1, actually it happened with my boss notebook, which is acer. while at the other laptop and computer, i found none of this error. don’'t know what happened. sigh