Samsung SmartThings Hub 2018 and 2015 model firmware version 30.3 will be released to customers starting Monday, May 4th. This release includes improved responsiveness of Sonos device discovery and other minor bug fixes and stability improvements.
Your Hub will briefly go offline as it reboots and applies the update; most users will experience less than one minute of downtime. Visit https://community.smartthings.com/t/hub-firmware-release-notes-30-3/192283
for more information. We will update the status page once the release has been completed.