Key Interpolation method is not saved when calling the color picker by key editing of Sequencer

The problem is that the interpolation method is not saved when editing the Vector Parameter.

1. Create a level sequence.
2. Create a Material Parameter Collection and create a Vector Parameter.
3. Add the Material Parameter Colorection Track to the Level sequence and add the vector parameter.
4. Create a key and change the interpolation.
5. After closing the color picker, it will be Cubic (Auto).

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