Not sure how tight your thing is with her. Take this at face value, no need to read anything into it. What you can see is some guy is approaching her and somehow got her address. She is accepting the approach, she may not be responding you do not know. If she did not want the guy to approach her she would block and delete, and never bother you about it. The only time she should show you a guy hitting on her is if the guy does not take no when she tells no, then you have to tell him. Now she has been told that it is ok for her to get attention from guys that are hitting on her, at least in this app, and also however he got the address. It is the, don't want to sound jealous trap and her playing on that. If you are living in separate places, she can do anything the same as you. If she is living in your place, she should have blocked and delete without ever bother you about it or even letting you know, and she should not have given an address to him. He might have gotten it some other way, but if he is persistent he probably got it from her. How does it show respect to you to let you know and at the same time force you to accept it by playing the jealousy trick? the result, you really would prefer she would block and delete. she has gotten her way on this and forced you to accept it.
not a huge deal like others have said, but it bothers you for a reason.