Duplication glitch when using a beacon

When opening a beacon and having One/Stackable of any Item selected can be double taping to be Duplication

*Expected results *
Double tapping any ltem shouldn't Duplicate

Actual result
Double tapping any ltem should duplicate

*how to reproduce *
1.Having a open a beacon
2. Select Any one ltem that stackable
3.double tapping that ltem to duplicate