Minecraft bug MC-279671

[在此处简要描述错误]

重现步骤：

1. [第 1 步] If the frame rate is less than 5, it will not be able to take off
2. [第 2 步] Once I entered the end of the world in LAN creation mode, it turned out that I couldn't fly and couldn't hit the ender crystal
3. [第 3 步]

观察到的结果：
[描述发生的情况]

预期结果：
[描述应该发生的情况]

附截图/视频：[请附上图片或短视频]

*笔记：I can't find that LAN world anymore, and I didn't record it at the time