Yes, leaking can be a common occurrence during vape related action in fact it is SO common that we really need a bunch more information in order to help you. Most leaks can be fixed.
It was a common occurrence for my rebuildable tanks to leak really depressing rapidly to the point that I had oceans of eliquid all over my ohm's reader and even after THAT stopped I was like "I will never take one of these out of the house" but then I got even better after taking a few remedial leaking 101 classes, and now some of them get to surf around in my purse, sometimes upside down, and they STILL don't leak.
So many if not all sorts of leaks can be fixed, but tell us about your gear, heck post pictures if you want. It will help everyone help you if they know what exactly you are talking about and with what type of gear.
Anna