Hmmm I have one of these but in 650mah, I've had no issues at all as you describe and I always use kangers on it. Though its from another company and possibly another manufacturer - but I doubt it - they're identical just different mahs. Sounds like a defect to me - since some others are having a similar issue it may reflect the quality of the manufacturer and the product. Of course it has to be a defect - what company would INTEND on the item resetting itself? Sounds very inconvenient. I have one coming in the mail I ordered the other night, I definitley hope it doesn't have the same issue, that would drive me crazy. Let us know what transpires with your batt, I'll update this thread after some time with my new one to let others know if this is a prevalent quality control issue.
Also, are you using the visions clearomizer on the ego vv? At 2.8 ohms I need to use it on 5 volts or higher (with my mod) and it works great, at 3.7 though, no way. There are lr versions of it out there, I've seen them with another canadian company. I've used the dual coil tanks with lr cartos on the ego vv though and that works really really good, its like using a kanger that you never have to top off, definitely my new vaping setup, try it if you like the kangers and want to have a set up you can leave for all day.