Hello! I see you're experiencing a white flashing screen and severe lag when entering Sky Block in Blockman GO on your Android 13 device using WebKit. Let’s see if we can get you back to playing smoothly.

To better assist you, could you please tell me:
- Are you using the official Blockman GO app from the Play Store or playing via a browser?
- Have you tried any fixes already, like restarting the app or device?
- Is your internet connection stable when this happens?

Meanwhile, here are some straightforward steps you can try:

1. Restart your device: This can clear temporary issues.
2. Clear app cache/data:
- Go to Settings > Apps > Blockman GO > Storage
- Tap "Clear Cache" (start with this) and test the game
- If problems persist, you can try "Clear Data" but note this may reset game settings or require login again.
3. Check internet connection: Ensure Wi-Fi or mobile data is strong and stable. Lag and loading issues often result from poor connectivity.
4. Update the game: Make sure Blockman GO is updated to the latest version.
5. Close background apps: Free up RAM by closing other apps running on your device.
6. Reinstall the game: If none of the above work, uninstall and then reinstall Blockman GO.

If you’re playing through a browser on WebKit rather than the app, try switching to the latest official app version, as the browser environment may cause these issues.

If problems continue after these steps, there might be a specific bug with Sky Block loading on your device or OS version. In that case, I can check for any recent fixes or updates from the Blockman GO team.

Would you like me to guide you through any of these steps? Also, if you tried any of them already, please let me know which ones so I can suggest other solutions.

Are you satisfied with the solution I provided so far?