LOL new hero Millennium found a major BUG postponed to the 5.20 version online

Many players of LOL are looking forward to the launch of the Millennium, but recently the official said that the Millennium will not be online in the 5.19 version. Because there are major bugs in the Millennium, then when is the new hero of LOL going online? To share the online time of LOL Millennium for players' reference.
Early today, Riot Iniquitee announced that due to game-related issues, Millennium will be postponed to version 5.20: Hello everyone: Although we said in the 5.19 that the Millennium is about to go online, and just released its hero introduction video, but just released its hero introduction video, but I want to share a very bad news with you. I am going to go to the 5.20 version to get online. We have found an important issue that affects gameplay, and the direct relationship with the Millennium has caused us to be unable to go online. We did not choose to carry out grassland restoration, but took a due diligence investigation to maintain the integrity of the game, and then launched the next version (after all the repairs were completed), so that everyone can get enough protection. Until then, I hope that the global finals can keep everyone's enthusiasm. We really want to see how this hero will perform in the hands of players. They will still come!