Used too show the legs separately so that they could be viewed in isolation.
I think there are some issues with the server in the last few hours, loading the activity data quite slow, and often incompletely. Probably due to a not properly working load balancing, or overloaded servers. See also here: https://forums.garmin.com/apps-software/mobile-apps-web/f/garmin-connect-web/292791/can-t-load-view-activities-older-than-12-21
