You will sometimes have to complete a review session to force the app to ‘refresh’ the number of items that can be reviewed with other modes, such as Learn with Locals or Pronunciation. This is a limitation with the app, but should only occur rarely, e.g. when you first launch the app after a reinstall. Is this happening often?
This shouldn’t be happening: are you able to uninstall the app, restart your device and then reinstall it? This should fix the issue.
If it keeps occurring, please let us know which device you’re using, your OS (e.g. Android 10, 11 etc), the version of the app, and steps to reproduce, e.g. does this only happen when you launch the mode via the ‘next up’ yellow button? Or also when you select a mode via the mode selector (button with the dots)?