In absolute mode, I noticed the same thing when keyframes were inside nested elements. As soon as I pulled them out, the shaking was gone. For example.
Choppy:
<section class="scene two" data-0="transform:translate(0%,100%);" data-100p="transform:translate(0%,0%);">
<div class="box" data-100p="transform:translate(0%,100%);" data-200p="transform:translate(0%,0%);"></div>
</section>
Smooth:
<section class="scene two" data-0="transform:translate(0%,100%);" data-100p="transform:translate(0%,0%);"></section>
<section class="scene three" data-100p="transform:translate(0%,100%);" data-200p="transform:translate(0%,0%);"></section>
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