IP Rewards when joining with friends does not work

Introducing the new Dynamic Queue and Season 6, IP rewards entering a Dynamic Queue like 300% Bonus IP or something? well it's been a while, and that continues to not work as intented. I was joining queues with like 4 friends and with first win of the day i gained up to 400 IP or something.. and iam doing the same the past few days and it gives me normal IP like i'm playing solo instead of giving the IP bonuses like it supposed to. Specially to new players that don't own many Champions that's a bit of a problem so check it out :)