对于曲线消失的问题，可能是由于某些特定的设置或操作导致的。根据以往的经验，这类问题可能与图形界面设置、曲线编辑器的预设、或是某些特定的版本bug有关。建议您检查一下曲线编辑器的预设设置，确保它们没有被意外更改。此外，您可以尝试更新到最新版本的Spine，因为有些bug可能已经在新版本中被修复。如果问题仍然存在，您可以将相关的Spine项目文件发送到 contact@esotericsoftware.com，以便我们更详细地查看问题。

Hello, what version of Spine are you using? Do you have AutoKey active? I noticed that while you edit the curve it goes from red to orange. This may be a bug, could you please send us a log when this happens, and if possible also the project file this is happening to (images should not be necessary) to contact@esotericsoftware.com

yugutou Logs can be found at any time at the location listed in our troubleshooting guide:
https://esotericsoftware.com/spine-troubleshooting#spine.log