Hey everyone!
Hotfix 5.5.3 is now available and resolves the critical bug where Blueprint-added Skeletal Mesh Components on Actors in the world could lose overridden Skeletal Mesh Asset property values when updating from 5.5.2.
What changed
The issue was caused by invalid serialized data in 5.5.0 and 5.5.1 which was exposed due to a subsequent change in 5.5.2. The change in 5.5.3 attempts to fix up any affected Skeletal Mesh Components so that the overridden properties will be serialized and displayed correctly after the upgrade.
Impact to files
If you’re installing from Epic Games launcher, please note that only assets saved in 5.5.0 or 5.5.1 are affected by this issue.
For those of you building from source, some assets marked as 5.6.0 may be affected. This would happen if an integration was made directly from UE5-Main after the Release-5.5 branch was created. If this is the case, the range of assets that are fixed up by the 5.5.3 code can be extended by enabling the a.ExtendSkeletalMeshDataCleanupRange cvar.
Thanks for your patience—happy developing!