denjia2009 谢谢你提出这个问题! 准确地说，这个问题并不限于按键偏移的情况，而是由于在一个循环动画中，即使开始帧和结束帧的按键值相同，而且它的曲线手柄是直的，在缩放时也不能保持角度，除非手柄是水平的。
然而，这确实是一个导致调整整个动画持续时间的一些额外努力的因素，所以我已经创建了一个票据来改善这个问题：EsotericSoftware/spine-editor746
你可以订阅该问题单，然后你会在任何进展中收到额外的通知。

Thank you for raising the issue! To be precise, this issue is not limited to the case of offsetting keys, but is caused by the fact that in a loop animation, even if the keys at the start and end frames have the same value and its curve handles are straight, the angles are not maintained when scaling, except when the handle is horizontal.
However, this is indeed a factor that causes some extra efforts to adjust the duration of the entire animation, so I have created a ticket to improve this issue: EsotericSoftware/spine-editor746
You can subscribe to the issue ticket, then you will receive additional notifications upon any progress.

denjia2009 谢谢你的补充，的确，这似乎像是一个错误。确切地说，这个问题似乎从4.1.20开始就出现了。我认为它应该在下一个版本中被修复，因为对手柄的修复已经被列在4.1.22版本中要增加的修改中。当我们发布时，我会让你知道。我们很抱歉给你带来的不便，但请你再等一等，直到我们修复这个问题。

Thank you for the supplement, indeed, this appears to be like a bug. To be exact, this problem seems to have occurred since 4.1.20. I think it should be fixed in the next version, since a fix for handles is already listed on the changes to be added in 4.1.22. I will let you know when we release it. We are sorry for the inconvenience, but please wait a little longer until we fix the problem.