I was running a mile loop that I've run a thousand times before and when I got to the halfway point my 955 showed only a .25 mile (should have been a .5 mile). So I kept running and when I reached where I would normally have a mile, showed that I only ran a .5 mile. So I ran the loop again and it gave me .9 of a mile. Just looked at my run on Garmin Connect and it shows the distance as a mile but the map pretty much shows that I ran less than a 1/4 of the loop.
I did get a software update but I've run 2 or 3 times since the update and this is my first wonky run.
edit: Thinking back to my run, I may have started without verifying that I had a gps lock. This watch has been so quick to pick up gps that I kind of got out of that habit I guess. Makes sense why the first part of my run is missing. Still some wonky behavior bee tv after it seemed to lock in. At least I know I'm not alone. Thanks for all your responses.