Garmin Connect not syncing long run data

Hello, after more then 13h recording hiking route don't want to sync via connect. After 24h still not sync.
It was for register new world record and I was afraid something was happened and not saved.
I checked with PC and found .fit file on this day. I import it manual via https://connect.garmin.com.
Activity is : https://connect.garmin.com/app/activity/23741044361
Can i do something do not have this issue more?
How I can proceed in future? 
Thanks a lot