AnimCurveCompressionSettings's codec is reset to CompressedRichCurve when user open the project, so user can not keep the state changed to UniformlySampled.
The following code in the constructor of UAnimCurveCompressionSettings is the cause of this issue. This code is for fixing
expect : the codec type is UniformlySampled
result : the codec is CompressedRichCurve ( reseted )
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-74873 in the post.