Please try the following steps to try and recover your progress:
1. Please update the game to the latest version.
Android - Google Play
iOS - App Store
2. Please make sure you have enough storage space on your device.
The game is saved locally on your device, and that data can be backed up in the cloud. Therefore you need enough space on the device to save your progress. You can check how much space is left on your device through the following steps:
on Android: open "Settings" > "Device Care" > Tap "Storage"
on iOS: open "Settings" > "General" > "[Device] Storage"
3. (Android only) Please enable all background data usage for the apps [Wonder Merge] and [Google Play Games], respectively. It should look like this:
1. Please update the game to the latest version.
Android - Google Play
iOS - App Store
2. Please make sure you have enough storage space on your device.
The game is saved locally on your device, and that data can be backed up in the cloud. Therefore you need enough space on the device to save your progress. You can check how much space is left on your device through the following steps:
on Android: open "Settings" > "Device Care" > Tap "Storage"
on iOS: open "Settings" > "General" > "[Device] Storage"
3. (Android only) Please enable all background data usage for the apps [Wonder Merge] and [Google Play Games], respectively. It should look like this: