2 different flights now in go home mode the bird came back 40-50 mph! Thats faster than normal. The first time was 20,000' out and when it was in RTH going 40+ i thought it was strange & i would normally take back control but it was moving so fast i let it play out. When it got to me instead of stopping(app show home point recorded where i was standing) it shot past me by 300' although it slowed to 20ish mph. Took it out again rth was normally slow. 3rd flight rth w/ 3 mph tailwind in go home mode was 49mph. Thats faster than normal so i let come back to test hp and it shot past & to the left and once past me slowed to 20ish mph i let it go bout 600' and took over. 4th flight normal rth & hp. This is a pattern i dont like! Any body got thoughts.