There is a new version of the Trimble Connect for Revit Add-In released today. Version identifier for this release is 1.51.1. The new version is available for download in the Connect apps store page for Revit versions:
There is a new setting in the preferences: Export special properties
Fixed an issue where uploading of the Revit Phases as property set failed if neither the creation, nor the demolition phases were set for an element.
Fixed an issue where a certain model was not viewable in the Connect 3D Viewer after uploading due to a file conversion error.