the friendlist feature of the game has its bugs already, especially when having a lot of buddies. The main problem happens when you are trying to add a person that has a full friendlist and did not buy more buddy slots. If the person accepts the friendlist "bugs out", meaning: You can not add nor remove that friend, while he is on your list (only if you search with the name).
- Find a friend that has a full friendlist.
- Friendrequest the person.
- Wait for the friend to accept.
- Watch the friend not appearing and bugging.