We have a library we will register project documents.  We create a workflow to check if the projectcode that the user enters exists.
Therefore we perform a collection operation with the exist action on a list on another site. 

The projectcodes in  source list consists of 2 letters, a space and 2 or 3 digits, ie gaa 123].

In the workflow we query to list to get a collection. In the next action we perform a collection operation to see if the projectcode the user entered  exists in this collection.

It turns out that the collection operation exist never returns a “ true”  result.

On a list with no spaces the exist operation works as expected.

How can we use the collection operation on a collection with spaces?  And is this a bug or feature?