Mar 10/2023: With the Air Command’s latest v7.1.21.0 update, Samsung fixed the Galaxy S23 Ultra’s S Pen issue.
Mar 04/2023: Users of the Galaxy S23 Ultra recently reported that the S Pen stylus would randomly disconnect while in use. This issue appears at random. When this happens, users must plug the S Pen back into the Galaxy S23 Ultra and pull it out again to reconnect.
Another method, in addition to resetting the S Pen mode, is to enable the “Keep S Pen linked” option. This feature is turned off by default, allowing the S Pen to save battery life when it is dormant for extended periods of time.