I think I already reported this internally but noticed editing (scrubbing, selecting and moving keyframes) gets terribly slow once you have a Timeline that looks like this:
Could you please submit an issue from within Hype, using Help > Report an Issue? When you do so, please also include your document in the Issue Reporter’s Attachments section, and ensure that the “Send logs, preferences, and system information” checkbox is checked.
Are you animated CSS filter effects? Those effects are the most computationally intensive.
Done! Yes, I’m using scale and rotation effects. You can check it in the document I’ve sent to you.
Let me know if you find what the culprit is. In the meantime, I’ll find an external solution to this kind of animation. I simply cannot get work done in this state.