Missing Drivings progress is almost always work done before creating an account, or while signed into a second one. Progress made signed out lives only in that browser. Check which account you are in under Profile, and email support@drivings.com if it is still missing.
The usual cause
Progress made before you signed up is stored in that browser only. It carries across when you create an account on the same device — but not if you cleared your browser data first, or switched device before signing up.
The other usual cause
Two accounts. Signing up with email and later signing in with Google using the same address can create a second account, with your progress on the first. Check which one you are in under Profile.
If that is what happened, email support@drivings.com and we will merge them rather than you starting again.
Streak specifically
A streak resets after a full missed day, and days follow your device's time zone — see streaks. A streak that vanished overnight after a late-night session is usually this rather than a fault.
Still missing
Email support@drivings.com with the address you signed up with and roughly when you did the work. Progress is stored per account, so we can usually find it.
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