I received My Vamo today and I have some questions. I brought the Vamo vv mod v2 but it has black rubber buttons is this the revise version? when I was vaping i was taking 4 or 5 vapes in a row I tried to vape again and nothing happened no vaper or errors and it's not powering down either than I tried it again and it worked. This happen a couple of times and than I notice that the ego clearomizer was a little hot. Is this normal or do I have a problem with my Vamo vv mod or ego clearomizer ? I am using 1 icr18350 3.7v 900 mAh