"Ineligible to join your game" Bug -- Signal Boost

I am encountering a bug wherein I am unable to invite people on my friends list -- with whom I had just gotten out of a game with -- into a new lobby to play. This is incredibly frustrating for multiple reasons: Firstly, this person is my girlfriend, whom I am trying to teach to play this game through Intro and Beginner bots, and the flow of play is constantly interrupted when or both of us has to ReLog in order to get into the next match. My second point has already been mentioned: These are INTRO and BEGINNER BOTS games -- there should be no ineligibility for this at all!

And, finally, this apparently been affecting a number of people, as demonstrated in threads that will be linked below. Now, while it is true that these threads suggest that only a small amount of people are encountering this bug; the fact that an error of this nature exists at all is extremely off putting, especially since it can affect games modes that are targeted, almost exclusively, at New Players.

I implore anyone who has encountered this error outside of Ranked Matches to post here and discuss, so we can get a decent idea of how many people are on the receiving end of this bug, and bring it to Riot's attention --- bugfixes require noise.

Previous threads, https://boards.na.leagueoflegends.com/en/c/bug-report/jGbfNs1G-ineligible-to-join-your-party -- Ominarous' Thread https://boards.na.leagueoflegends.com/en/c/bug-report/pa6hGgyu-player-is-currently-not-eligible-to-join-bug - Narter4's Thread