It's been known for so long now and riot has punished teams but not fixed the bug
Because they were waiting for an excuse to give victory to another team.
Well tbh a professional team using a known exploit in a match which was streamed live to 200-300k viewers for which teams have been penalized previously is something that u just won't believe would happen but it did. Shitty decision by Riot to not fix the bug. Even Shittier decision by VK IGL to use it.