After converting the block content from paragraph to heading during composition on iPhone, the editor will not respond to subsequent input

[clumsyme]

Device: iPhone 11 Pro OS: iOS 16.1.2 keyboard: Simplified Chinese Pinyin Steps to reproduce：

• go to prosemirror.net, create a new paragraph in editor
• type in some text
• change the paragraph to heading while in composition

video:

https://github.com/ProseMirror/prosemirror/assets/9589947/a86a6158-3ad2-4c5e-a9d0-b1a49efd7ca8