After updating to cPanel version 102.0.12, you may still encounter errors attempting to load domains on the server, and notice the domain is missing from the Apache configuration.
In v102, queueprocd was refactored for faster processing which exposed race conditions in child processes. This results in child processes not properly completing, further resulting in missing virtual host entries in the Apache configuration.
We've opened an internal case for our development team to investigate this further. For reference, the case number is CPANEL-40507. Follow this article to receive an email notification when a solution is published in the product.
Rebuild the Apache configuration and restart Apache:
/scripts/rebuildhttpdconf && /scripts/restartsrv_apache