Fence Sections Disappear, Leaving Only Fence Posts

This keeps throwing me off because it is so random for me when it comes to a solution. I have tried the fix you guys are talking about and it has been the most likely to work but sometimes it still is an issue. I also have tried using the sledgehammer to delete the fence and then using undo and redo back and forth frantically until my original fence somehow materializes lol. So im gonna go ahead and label my comment as not helpful...sorry about that, i just wanted to put in my 2 cents