All of a sudden my features aren't selecting properly when using the "select by rectangle" tool. Previously, I could click on an individual point feature and that feature would be selected. If I enclosed a group of points with the rectangle, each of these point features would be selected (as expected). For some reason, this selection behavior is not working. It is as if each point feature has an invisible line extending some distance to the right, and if that line intersects the "select by" rectangle, then the point feature is included in the selection.
This behavior is consistent for all feature classes, regardless of geometry.
If it helps. . . Many of my feature classes have heavily edited tables (field edits) and geometries (point features moved) I am using ArcGIS for Desktop v10.6 (Windows 10) My data is all stored in a file geodatabase.