It's time for another round of software updates for all 10th and 11th generation Kindles, including the Kindle Paperwhite 4 and 5, along with the Kindle Oasis 3, the current and previous entry-level Kindle, and the Kindle Scribe. The new software version is 5.16.6, and it's available to download from the Kindle Software Updates page
Version 5.16.6 Kindle 11th Gen update no longer has Series Group On/Off option
releases new Kindle update which solves many bugs - Good e-Reader
How To Force Software Update On Your Kindle Paperwhite 11th Gen
Tutorial LanguageBreak - Software Jailbreak for (probably) any Kindle <= - MobileRead Forums
Kindle News - Good e-Reader
Releases First Software Update for the Kindle Scribe (5.16.1.2) – eWritable
Kindle Scribe Update 5.16.2 Adds More New Features
New Software Update to Kindle! : r/kindle
Kindle E-Reader Software Updates - Customer Service
Is the Kindle Oasis dead? : r/kindle