KB5127648 Increased Size of Recovery Partition

I just installed KB5127648 and noticed that the Recovery Partition increased in size from 850 MB to 922 MB.

Does anyone know if this is a new feature? I assume the space was taken from the C: partition.

In the past I always had to manually increase the size of the partition.

WinRE.wim increased in size to 789.39 MB.

Microsoft documents this behavior under "Updating the on-disk Windows Recovery Environment":


When a newer WinRE image doesn't fit in the existing recovery partition, Windows can automatically shrink the Windows partition (C:) and enlarge the recovery partition, provided the partitions are arranged appropriately.

So the increase from 850 MB to 922 MB is consistent with Microsoft's documented behavior. This capability is not entirely new, although it may be the first time you've seen it happen automatically.