Going into the bedroom

I just can't get past this. There was no reason for Melanie to go into the bedroom at the end. None at all. So she heard some flapping. Obviously a bird had gotten in, so, hey, probably not a good idea to go in there right now. Apparently Tippi Hedren even pointed this out to Hitchcock and asked why her character would ever do that and he just said "Because I told you to." Weak storytelling.

Does this bother anyone else? For me, it's why I hate the ending. Not because of the ambiguity and the continuation of suspense and sense of dread when they drive off, but because this decision to have Melanie go upstairs so was illogical and pulled me from the world of the film.