Not sure if you consider this a bug or somewhat poor design (or good design, but I do not see the benefit of the way it works!). When adding a new Collection, I have the ability to name the collection. By default it present me with a name ‘New Collection’. Then if I click elsewhere (since New Collection has been selected, it is replaced by empty space), or backspace the entry, then it turns up with a blank name. And I can name all my Collections blank or all the same name if I like.
This seems like it is confusing and counter-productive to the purpose of having a Collection or multiple Collections in the first place. I think (1) you should be forcing the Collection to have a name, and (2) they should be unique names, or at least a warning provided if you attempt to name it the same as another Collection.