It definitely is LOR and I bet that's what has been causing the issues the past few weeks. I really hope they didn't just hit the "fuck it" button and erase all friend groups since they were too lazy to code it into LOR and wanted to separate friends in your friends list playing different games.
Where is the transparency, riot? I liked to have friend groups for friends from college and my collegiate LoL playing days vs the friends that I actually play with now. It's really annoying now that a lot of people have changed their summoner names, I will have NO idea who they are since they no longer have the group I assigned them to.
But hey, I guess we're all used to stuff like this at this point. It's even more perplexing that they made LoR a different client and everything when TFT is implemented directly into the current client. Especially when I believe their goal is to have a "Riot Launcher" for all their games.
RITO PLS.