New Masking Premiere 2026, Can't Use First and Last Frame Trick, and some Bug

Hello, I have a question regarding Adobe Premiere 2026. Is it still possible to use the 'old' masking method?

I am very comfortable using the technique of setting a keyframe on the first frame and another on the last frame, allowing the mask to interpolate (move) automatically between them without using the 'Track Mask' feature. On my system, the automated tracking process is very slow, so I rely heavily on this manual first-and-last frame method.

However, in the new Premiere Pro 2026, I am finding it very difficult to do this. I’ve even encountered a bug: when I use the Path tool to manually create a mask on the first frame and then move to the last frame to adjust it, the mask doesn't respond correctly. I cannot move the mask points directly in the Program Monitor; instead, I am forced to manually adjust the numerical values in the Effect Controls panel to get any movement. I’ve already tried anything solutions in this website, google, and AI, but none can’t fixed this.

Please look into this, as this manual keyframing workflow is essential for my speed and comfort. If there isn't a fix or a way to revert to the old behavior, I may have to downgrade back to Premiere Pro 2025. Thank you.