Hi,
Thanks for the quick reply.
As you can see from the video, I am currently only using one layer in the test tube, and halfway through the animation, I've modified both values from Bubbles opacity and the Amount. This issue will not occur if I am using Default No Flask setting.
I am not sure if either one of the function; OnValidate() or OnDidApplyAnimationProperties() from our previous discussion are the ones causing this bug. Still, I was hoping through here that we can find a way to stop the auto calculation and set the value ourselves.