This is something the game team is looking into to but we don't know how long it will take them to solve this. This only seems to happen to a small % of players so it's not easy to find the issue.
If you happen to have Windows 10 installed on your PC, try downloading the game from Microsoft here: https://www.microsoft.com/en-us/p/farm-heroes-saga/9nkmkxnqv2m8?activetab=pivot:overviewtab
Make sure you connect the game app once installed so you can continue where you left off. Please note that boosters and lives do not get synced as well as any extra challenge and extra feature competed.
Hope this helps
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