When I "Temporary Hide" elements or categories they don't return to view when I "Reset Hidden/Isolated Temps". Nor is there a "Unhide Elements/Categories. At least not always. I can see the elements and categories in the "Reveal Hidden Elements" view, and several times I've had to select everything that hidden from that mode, then go back and re-hide those which I actually want to keep hidden, like reference planes and reference lines. The problem is that I can't tell what I've done differently this time (happened 3 times today) from the times when it works as expected.
This is probably another rookie error, but I've been able to perform these function with no problems until now. Please help, if you can.