I have a problem with google tasks sync.
It's on, every 6h, and it displays when was it last synced, which is all all right.
The problem is that I change something in my Tasks app, and check SolCalendar to see it (the day after, or after 6h have passed...), but the changes are not applied. The I go to settings and check when was the last sync and it shows that it was synced after my changes... Then I sync it manually and finally my changes are applied.
This has happened a few times.
If I change something in Tasks in the evening I don't see it in the briefing in the morning. It's frustrating.
Hope you can fix it,