Recently played with always has zero users

For the last few weeks I have been looking to add ‘recently played with’ players from Hearthstone matches. I have been added by opponents, but my “Recently Played With” always lists 0 players, I have checked right after matches several times and no one is listed ever.

This happens whether appear offline or not.

See below for what I see when I look at my “add a friend” list:

I have looked through settings in the app and haven’t seen many others with the same problem. No clue what’s going wrong.

Best wishes