Base Pose Type Not Retained When Retargeting Animation with Additive Anim Type

Occurs 3/3 Times

Base pose animation is not retained when retargeting animation with an additive anim type.

Repro Steps:
1. Create a TPS template project.
2. Open the MM_Jump animation. (Any animation can be used, this is an example).
3. Set the MM_Jump Additive Type to 'Local Space'.
4. Set its Base Pose Type to 'Selected Animation Frame'.
5. Select MM_Idle for the Base Pose Animation.
6. In the Content Browser, right click MM_Jump and select Retarget Animation Assets > Duplicate and Retarget Animation Assets > Select the RTG_UE5Manny_UE4Manny.
7. Open the Retargeted MM_Jump animation.

Expected: The Base Pose Animation is set to MM_Idle animation.
Actual: The Base Pose Animation is empty and must be reset.