Laravel Eloquent - distinct() and count() not working properly together

So I'm trying to get the number of distinct pids on a query, but the returned value is wrong. This is what I try to do: ``` $ad->getcodes()->groupby('pid')->distinct()->count() ``` what returns the value "2", while the value it should return, should be "1". As a workaround, I'm doing this: ``` count($ad->getcodes()->groupby('pid')->distinct()->get()) ``` what works fine and returns "1" Is there any rule where count and distinct cannot be on the same query? I find the workaround kind of "heavy", I would like to make the original query work :(