Select multi lines and input a word ,composing lost

I found it is works well in “ProseMirror basic example”. can you help me figure out what happends , maybe a input rule or keymap broke it?

Nothing comes to mind. It should be possible to narrow this down by successively stripping down the setup in which it happens towards a plain ProseMirror editor, and seeing at which point the problem stops occurring.

It works well in plain ProseMirror editor. The problem only in ’ outline/rich-markdown-editor’. If you have a chinese input method, you could run the storybook in “GitHub - outline/rich-markdown-editor: The open source React and Prosemirror based markdown editor that powers Outline. Want to try it out? Create an account:” to reproduce it . I have no idea. so come to search help