Photoshop CS6 introduced the ability to search/filter layers based on a number of parameters using the filter bar at the top of the Layers panel. Photoshop CC took search/filtering one step farther by adding the ability show only selected Layers (while temporarily hiding non-selected layers in the Layers panel), by choosing Select > Isolate Layers.
However, when “toggling off” or exiting Isolation mode, Photoshop CC simply turned off the filter in the Layers panel, instead of resetting the Layer Filter. Now, in Photoshop CC (v14.1), toggling Isolation mode “off”, resets the Layer Filter to default values .
Note: Isolation Mode is inactive when using the Direct/Path Selection tools in Active Layers mode.