How do I sync interval workout splits from Apple Watch to Condition app?

Help,

I just had an interval workout. On my iwatch everything was well indicated such as how far, time, heart rate etc per split. But now it is not synchronized to the condition app.

Is there a way to get this training synchronised anyway or a way to prevent this from happening again?

Note: a couple days ago it did work.

[Re-Titled by Moderator]