I've recently updated my v3 sites (mainly testing and development - nothing live) from the latest github code.
For me, it has a major issue. Some of the core packages have a requirement for PHP 8.1. Thus breaking my sites.
You can get around this issue by running composer update on the core folder. This will downgrade packages to match your server environment.
If you cannot run composer update then I'd recommend not updating for the time being!