The issue you're experiencing with Spine animations taking a long time to respond when clicked in the Unity Timeline could be related to performance problems with loading or processing the animation data. One potential cause could be the size and complexity of the JSON data exported from Spine, which might be causing delays when the data is loaded or processed in Unity. Additionally, if there are any inefficiencies in how the animation data is being handled or if there are floating point precision issues, these could also contribute to the slowdown. It might be helpful to check if the JSON data is being processed efficiently and to ensure that the Spine runtime and Unity versions are compatible and up-to-date.

TaoXie Unfortunately, it is difficult to pinpoint the cause with the information provided, but from what I have been able to find, it seems to run slower when Enable Audio Scrubbing is enabled in the Timeline Settings, or slower depending on the preview settings.

If it is slow to click regardless of these settings, could you please create a new Unity project to create a minimal Unity project that can reproduce this problem and then email it to us?: contact@esotericsoftware.com
Please include the URL of this forum thread in the email so we know the context. Then we can take a look at what's wrong.