When 1 AnimSequence asset is used for multiple SeuqnecePlayer, the override by AnimGraphOverrides affects other than the specified SequencePlayer.

If you use the same AnimSequence in multiple SequencePlayers in Base AnimBP and replace asset of one of SequencePlayers by AssetOverride in Child AnimBP, the result will be reflected in the other SequencePlayers as well.

Probably this issue is due to the fact that under the above conditions, only 1 AnimSequenceBase is stored in the ConstantProperties of UAnimBlueprintGeneratedClass.

And you can tentatively solve this is by setting the AnimSequence property of the SequencePlayer node to Dynamic.

1. Open attached project
2. Open Content/sample/overrideAnimBlueprint.uasset
3. Open AssetOverride Editor
4. Check 3 and viewport in Persona

Expect : AssetOverride works correctly
Result : The setting in AssetOverride and the playback result in Viewport are different.