When disabling material curve in Persona, the viewport will not update correctly until Persona is reopened

In Persona, when disabling a material curve, the viewport will play the curve at the value that it was disabled at, rather than at value 0.

The viewport will only show it correctly once Persona is reopened.

1. Open QAGame in editor.
2. Open the animation sequence SK_Box_Morph_1_Anim.
3. Click on Window > Anim Curves.
4. In the Anim Curves panel, click the checkbox next to Morph Color.

RESULT:

Material Curve will be disabled. In the viewport, the mesh will show the curve value of where it was disabled (the color will be a mix between red and blue).

EXPECTED:

When disabled, the viewport will show the curve value at 0 (red).

WORKAROUND:

Close and reopen Persona.