There were some firewall and networking issues recently and we decided to turn LeaverBuster off to ensure that players were not mistakenly sent to low priority queue. When the server issues were fixed, we turned LeaverBuster back on, but the penalties weren't firing. As a result of this, we're seeing that some players ***who left/AFK'd in games after the firewall and networking issues resolved*** did not receive their penalty until this week.
Sorry about the confusion! All low priority queue penalties should be granted immediately after leaving/AFK games now, instead of after a delay.