The diaper cover is leaking from the tag mainly because it is full. This only happens when the diaper is drenched full of moisture. We would suggest you do frequent changing at maximum 2-3 hour intervals. To avoid a recurring issue also use two inserts as it will increase absorbency!
If the diaper is not saturated, please check your inserts for repelling! You can see how to do that here:
For a comprehensive look at your leak issues check this link: