Hello Jovis Sagesse,
Since Build 26300.8935 is an Experimental Channel build, it contains early features and changes still being tested. Microsoft notes that these experiences may change, be removed, or never reach stable Windows, so occasional unexpected behavior is possible. As the issue started immediately after this update and survived the usual Windows Hello repairs, it is likely connected to the build, although Microsoft has not listed it as a confirmed known issue.
Please report it through Feedback Hub and share the feedback link so others can upvote it. Meanwhile, you can:
- Return to the previous build: Go to Settings > System > Recovery > Go back. This option is available only for a limited time.
- Return to stable Windows: Back up important files, then go to Settings > Windows Update > Windows Insider Program > Stop getting preview builds. If you need to leave immediately rather than wait for a production build, reinstalling Windows 11 using recovery media is required.