The launch of a really big update like the October 2018 update is not the end of a process, but really just the beginning. As soon as Microsoft releases a big update, they have to start working on fixing the bugs and then adding features.
After the October Update (version 1809) users experienced problems including the loss of all files in their documents, pictures, music and video folders. They paused the rollout until November 13th. They then released a further update on December 11th to fix the issue that prevented the use of the seek bar in Windows Media Player. The build also has security updates for Windows Authentication, Internet Explorer etc.
KB4469342 (OS Build 17763.168) that was released on December 5th was designed to fix 20 minor issues, including one that can cause mapped drives to fail to reconnect after starting and logging onto a Windows device. There were two main issues in the update including one in which users may not be able to use the seek bar in Windows Media Player.
KBB4467708 (OS Build 17763.134) that was released on November 13th 2018 addresses several security issues, including updates for Edge and IE as well as execution side-channel vulnerabilities for AMD based computers