Bug: Parcel Editor Add Line Point tool may delete existing line points
Using the Add Line Point tool in the Parcel Editor may delete existing line points in the same area. (BUG-000087361)
When adding a new line point, the point may be deleted if the initial release of ArcGIS for Desktop Parcel Fabric General Maintenance Patch (dated 22nd April 2015) is installed. Using the Add Line Point tool from the Parcel Editor toolbar in an area containing existing line points may cause some of the existing line points to be deleted.
This bug was fixed at ArcGIS for Desktop version 10.4.