I'm certainly not the right person to be giving you advice on this issue (i.e. my thread title) because after almost 9 months that H has been back I still have no transparency from him even though I've requested it many times and it was a boundary I requested before he returned.
You cannot control what H does. All you can do is make a request again, let him know how it makes you feel that he continues the contact and then decide what you will do if he doesn't follow through with your wishes. How much of a dealbreaker is it for you or are you willing to live with it for the time being if he's showing positive signs in other areas and hope that he will come to understand your request as time goes on? Only you can answer how much of a dealbreaker this is for you.
Me47 H46 S13 M16 Piecing since May/09
"Life is 10% what happens to us and 90% how we react to it." Lou Holtz
