SmartThings Sensors Constantly Going Offline And Not Sensing Activations

The update has not happened for your hub yet. The upgrade period started on the 20th and runs until July 1st. The latest version is 53.19.
You may want to keep a lookout for that version to be installed on your hub to see if it helps with your issue. Maybe ST support will respond with any info.

view the release notes in the following thread: