Nvidia continues to support Shield series and released another update based upon Android 11. The update released SHIELD Experience Upgrade v9.1 (33.2.0.125) for all SHIELD and SHIELD Pro units. This update is based on SHIELD Experience Upgrade 9.0 and includes the following fixes:

Enhancements:
Adds support to automatically enable game mode on supported TVs (ALLM)
Adds night listening mode (HDMI audio only)
Adds option specify network workgroup when connecting to SHIELD over local network
Adds option to create your own password when connecting to SHIELD over local network
[SHIELD Pro 2019] Adds AI upscaling support for 60Hz HDR10 video
[SHIELD Remote 2019] Adds option to only wake SHIELD with power button or NETFLIX button
[Game Controllers] Adds option to only wake SHIELD with logo button
Adds option to match uncompressed audio with Dolby reference volume levels
Adds option to disable displaying HDR/Dolby Vision content
Adds notification when app uses microphone
Bug Fixes:

Display
Fixes bug where Dolby Vision mode would become re-enabled after reboot

Network
Resolves issue where link speed was not reported when connecting ethernet cable
Resolves issue where “Restart Wi-fi” in Quick Settings was not working properly

Audio
Resolve audio pops heard after hotplug of USB audio devices
Fixes bug where some apps would only play through headphones after “Match content audio resolution” is enabled
Resolves issue where HDMI fixed volume required disable-enable cycle to work properly
Fixes bug where stereo upmix would not become enabled after playing multichannel discrete audio
[SHIELD 2019] Disables comfort noise feature when Dolby Audio Processing is enabled

Storage
Improves file transfer speeds to attached storage
Resolves issues where NAS would not reconnect after SHIELD restart

Accessories
Fixes bug where SHIELD Controller 2017 or SHIELD Remote 2015 would not auto pair after taking upgrade

SHIELD TV app
Fixes bug where SHIELD TV app would not send keyboard entries while streaming GeForce NOW
Resolves SHIELD TV app issue where user could not copy/paste text (passwords, URL, etc)

Other
Resolves issue connecting to GeForce NOW servers while NVIDIA Share is active
Improves stream to twitch duration indefinitely
Resolves issue where system would become unresponsive after enabling Dolby Audio Processing from quick menu
Resolves issue where SHIELD would wake up unexpectedly
Improved HDMI-CEC compatibility with other HDMI connected devices
Resolves issue where app switcher (double tap home) would not show most recent screenshot properly
Resolves adb connection issue where host PC would need to be re-authorized after 7 days
Fixes bug where D-pad "up" and "down" would not function after upgrade