Game invite is broken for past few patches now

I think its about time to fix basic things. The invite in summoner rift games does not work. The first time you invite and the game is over, after when you click play again, the invite doesn't go in. it basically shows it in invited list but its crossed and you have to invite again. then sometimes it says that the player is not ready while he is and you have to kick them and then you cannot invite them back again. You have to kill game type and create again. Then sometimes it just never shows the player in invite list so you can never invite. Sometimes it shows that the player is in champ select while he is not and then he has to create a game and invite you. So basically its huge pain in arse and doesn't work.

It always happens with one of 4 things I mentioned above after you have ended a game and wanted to start a new one. Kindly fix this easy thing so inviting someone doesn't have to be this painful.