This question involved the working principle of the novel reader. Different readers might have different explanations. When you click on the next chapter of a novel, the reader may automatically retrieve all the contents of the current chapter according to the set algorithm and load them into memory for subsequent chapters. When the next chapter was clicked, the reader would update the content of the current chapter according to the algorithm and buffer the updated content to the disk so that it could respond to the reader's request faster the next time it loaded. During this process, two chapters may be skipped because the update of the algorithm may cause the buffer to be inconsistent, resulting in the reader seeing different content. This could be because the chapter content originally stored in the memory had been moved to the disk after the algorithm was updated, or because the memory buffer was insufficient and needed to read the new chapter content from the disk. This phenomenon was more common in novel readers. Different readers might have different solutions, such as adding a buffer mechanism, optimization algorithm, and so on.