Hi everyone,
Especially for @Floppa G and others experiencing this, I've been investigating this issue deeply. The problem seems to be caused by a hidden update (KB5067039) that is applied alongside the main cumulative update (like KB5066835). This update seems to affect the USB drivers in the WinRE image.
While we wait for an official fix from Microsoft, I have created an automated batch file that safely extracts a clean winre.wim from a Windows 11 ISO and applies it to the system. This has solved the problem for me and others.
Please use it at your own risk. The full guide and the script are on my blog (the article is in Japanese, but please use your browser's translation feature):
https://windows-waza.com/mouse-and-keyboard-not-responding-in-windows-recovery-environment-the-cause-is-kb5067039/
Hope this helps those who can't wait for the official patch.