As part of the updates unveiling from xingwang's blog

There's also a wide variety of bug fixes, addressing everything from floating turrets to players being able to shoot after being downed. A complete list of these changes, along with all of the additions and tweaks in this update, can be seen on the official Rainbow Six website.

As part of the update's unveiling, we learned recently that Rainbow Six Patriots--the game that was in development prior to Rainbow Six Siege Credits Siege--was canceled in order to focus on a long-term, sustainable game with competitive multiplayer.

Ubisoft has introduced a new Starter Edition of Tom Clancy’s Rainbow Six Siege, which allows PC players to get into the game at a low price.