I have experienced issues over multiple versions of Fences where randomly the width of 1 or more fences becomes narrower. This causes either the left or the right side of the icons to be hidden. I then drag the fence width wider and voila. Working again for a while. Then a few reboots later and a different fence experiences the issue.
Currently Im on the latest beta build (cuz Im also experiencing the special level of hell that is the 4+ second launch lag)