Additive anim slot takes over when played with Matinee

When you have an animBP with two anim slots (one of which is additive) and are playing the animations via Matinee through each slot, the additive animation takes over and the base animation doesn't play at all.

Only the first frame of the base animation is played.

1. Open the attached example project
2. Take a look at the matinee in the level and how the TwoSlotMatineeTest AnimBP is set up
3. PIE

Result: Only additive animation is played over the first frame of the Base animation.

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