Instinct issues

Did you mean Live Track? Or are you speaking about the activity details in Garmin Connect?

Yes, the “live” track me operation.

"Live Track" is a special feature for following someone (or self) online, so it looks like it is not what you meant. But anyway, since the GPS on your display is not locked, it means the watch cannot get your position, so tracking or recording the path is not possible.

BTW, I had GPS problems today too - it took my watch almost half an hour to get the position. My EPO file is up-to-date, so I do not know what was the reason. Perhaps we got a faulty EPO fix.

If I wanted to keep using this track me function when I do cardio. I don’t want to lock my GPS. Correct? 

You cannot track without GPS. And as long as the GPS is not "locked" (no checksign in the GPS ring), the GPS does not work.

Not sure if I understand your cardio exercise, but if you run on a treadmill, use the Treadmill Activity to track the distance indoors.

My cardio is 3-5 miles every other morning. 

I run outside. I understood what you said. I was just confirming it. 

so basically if I am understanding you. It seems like the GPS function did not work this morning.

As I wrote above, I suspect there migh have been some corrupted EPO served to our watches today. Connect to a computer with Garmin Express over the USB cable, and check for updates - it will refresh the EPO file.

If it happens again, and you cannot get lock on the GPS, make sure your phone has data connection (assuming you have one with you while running), and that the Garmin Connect app is running and is connected to the watch. If everything looks all right, but still no GPS signal after several minutes, try powercycling the watch.