List disappeared after updating Apple reminder app

I am running iOS 18.01 on my iPhone 13 and GoodTask 7.8.4. I recently updated the Apple reminder app and immediately lost all my lists and hundreds of tasks.

I restarted both the phone and the GoodTask app several times. Lists and tasks are still gone.
I deleted the GoodTask app and re-downloaded it from the Apple App Store. No effect.

I insured that sync with the iCloud is turned on. GoodTask is one of the apps that is backed up every night to the iCloud.

Help….

This is Richard again. I just opened up the updated Reminders app on my iPhone 13 and all the lists and tasks are gone.

Thanks for using GoodTask.

I’m not sure exactly what you mean by updating Reminders app. One time Reminders were updated was at iOS 13 when new features were added through iCloud. Do you mean that you’ve done this update now?

If so, normally data should come back but if not, please contact Apple directly. After all data is shown properly on Reminders app, run GoodTask to run further actions.

Thanks!