Riot Games put out League of Legends patches every two weeks, like clockwork. However, LoL patch 12.5 will last for a whole month, instead of the usual week, due to Riot's corporate planning.
On their official website, Riot Games have announced that they are pausing normal operations for a week in March, to connect, reflect, and discuss their goals during a series of company-wide meetings.
What this means is that the game will have no updates from March 2, when League of Legends patch 12.5 went live, until March 30 when we expect patch 12.6 to rear its head.
Perhaps, knowing they will be taking a break, Riot did not wish to rock the boat too much when it comes to the game's meta, and it was due to this that the most recent League of Legends patch was so light in content.
Unfortunately for the player base, patch 12.5 has instated some changes for Master Yi, which have only been tested on the PBE servers up until now. And, as we all know, the Public Beta Environment servers cannot compare to the live ones in any way.
With the champion receiving significant buffs to hi on-hit build, and the items in question themselves being in a good place in the meta currently, we can expect Master Yi to give us a whole month of unhealthy domination on the Rift, with no hotfixes and min-patch nerfs coming to take care of any potential issues.