x cube

I recently purchased the Xcube Ultra and have had no issues with it so far, I love it. My friend purchased one today, and somehow after he takes a pull, a few seconds later, the device starts firing on it's own!! I can't find any info about this or any settings to change it. I looked on the app...

My X CUBE MINI update goes failed and my mod didnt working. What should I do? Please Help Me.