Unity Facebook apprequest notifcation opens browser instead of play store

I'm trying to make invite friends dialog on android using Unity Facebook sdk:s FB.AppRequest() call . Apprequest itself works fine and recipient gets the notification. If game is not installed on device it opens request to browser with "page cannot be found" instead of google play store.

However if user has the game installed, notification leads correctly to game. Game can be found from facebook AppCenter and opens correct play store link from there.

a) Am I misunderstood that notification should open play store if game is not installed?

b)Is there place for play store url somewhere (I guess not while Facebook settings can lookup playstore images correctly)

c)Should it be submitted to Facebook Appcenter?

Game is published to play store and it is not sandboxed in facebook.