For anyone having this issue, see if this helps. I had a friend unfriend and refriend me, which caused them (and only them) to show up in my friends list, and now we can challenge one another. I know rebuilding your friends list from scratch is not an ideal solution, but it worked for me after trying everything else.
For anyone having this issue, see if this helps. I had a friend unfriend and refriend me, which caused them (and only them) to show up in my friends list, and now we can challenge one another. I know rebuilding your friends list from scratch is not an ideal solution, but it worked for me after trying everything else.