Some of my feature lines disappear while zooming/panning in data view. I've tried to fix the spatial index (delete and recreate), I've tried exporting the data, etc. and I can't extract or save these lines, they just vanish when I try to recreate the spatial index or export the data. Some times I can select the lines in data view and some times I can't, some times I can see the records in the table and some times I can't. I'm using 10.3.1, and the line features are in a file geodatabase. Any idea's on what I can do to fix issue??