When adjusting "Color over lifetime", the alpha slider does not visually update when being dragged. The alpha values still change as expected.

Repro steps:
1. Open Particles_ColorOverLifetime scene from attached project (or create a new project and pop a particle system in).
2. Select particle system, enable "Color over lifetime", click on an alpha position and try to modify the value by moving the slider.
3. Observe how the value will change on the particle itself and in the transparency indicator above, but the slider remains unchanged.

Expected outcome: slider to work :)

Regression, worked in 5.4.0b2.