-Changing the location transform using Additive Layer Tracks is not visible when PIE and instead only visible in the Animation Preview. This only occurs when keying the location but not with scale or rotation.
-Tried with playing the animation as well as an animation Blueprint
-Using Additive Layer Tracks
-Location plays in the Animation Preview Window but not in PIE
-All transforms update in the animation's thumbnail
Expected: Location transform can be keyed and seen when PIE in a similar manner such as scale and rotate
Results: Scale and rotation can be altered and seen in PIE, but changing and keying the location of a bone can not
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-54318 in the post.