To resolve the issue of Photo Roulette continuously cycling through only 25 photos, even though you have granted the app access to your entire gallery, follow these actionable steps:

1. Check Gallery Access Permissions:
- Navigate to your device's Settings.
- Scroll to Apps and find Photo Roulette.
- Tap on Permissions and ensure that it is set to allow access to your Photos or Gallery. If permissions are limited, adjust them to grant full access.

2. Delete and Reinstall the App:
- Sometimes, reinstalling the app can reset its access settings.
- Uninstall Photo Roulette by pressing and holding the app icon and selecting Uninstall.
- Go to the Google Play Store, search for Photo Roulette, and reinstall it.
- Open the app again; when prompted, grant it full access to your photo library. This can help in refreshing the app’s photo access settings and may resolve the issue of limited photo cycling - learn more.

3. Update Your Device and App:
- Ensure that your Android OS and the Photo Roulette app are updated to the latest versions. Check for updates in:
- Settings > Software Update to update your device.
- Google Play Store > Search for Photo Roulette and see if an update is available.
- Updates may fix bugs that could be causing the cycling issue.

4. Review Photo Library Storage:
- Make sure that your actual photo library has more than 25 photos stored. Check your gallery app to verify that it contains other photos outside of the 25 you notice repeating.
- Depending on your device configuration, sometimes syncing issues might limit which photos are displayed to apps.

5. Reset Application Preferences:
- Go to Settings, then Apps.
- Tap the three-dot menu (or similar option) in the top right corner and select Reset app preferences.
- This may resolve conflicts between apps and restore default settings for Photo Roulette.

If the problem persists after trying these steps, consider reaching out to the app support team or checking community forums for further assistance - learn more.