Duplicate asset doesnt work correctly when using perforce on the mac

We have noticed a bit of a workflow issue when using the perforce integration on the mac - if you duplicate a prefab that is not checked out then duplicate will not be editable (it says 'cant edit already opened for add'), if you check out first then the duplicate will editable as you would expect. Does anyone know of a more permanent solution to this problem so that our designers aren't getting caught out by this?